| sea | (noun) a division of an ocean or a large body of salt water partially enclosed by land | - |
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| (noun) turbulent water with swells of considerable size | - |
| (noun) anything apparently limitless in quantity or volume | Synonyms: ocean |
| seabag | (noun) a cylindrical drawstring bag used by sailors to hold their clothing and other gear | - |
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| seabed | (noun) the bottom of a sea or ocean | Synonyms: Davy Jones's locker, Davy Jones, ocean bottom, ocean floor, sea bottom, sea floor |
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| seabird | (noun) a bird that frequents coastal waters and the open ocean: gulls, pelicans, gannets, cormorants, albatrosses, petrels, etc. | Synonyms: sea bird, seafowl |
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| seaboard | (noun) the shore of a sea or ocean regarded as a resort | Synonyms: seaside |
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| seaborgium | (noun) a transuranic element with atomic number 106 | Synonyms: atomic number 106, element 106, Sg |
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| seacoast | (noun) the shore of a sea or ocean | Synonyms: coast, sea-coast, seashore |
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| seafarer | (noun) a man who serves as a sailor | Synonyms: gob, Jack-tar, Jack, mariner, old salt, sea dog, seaman, tar |
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| seafaring | (noun) the work of a sailor | Synonyms: navigation, sailing |
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| (noun) travel by water | Synonyms: water travel |
| seafood | (noun) edible fish (broadly including freshwater fish) or shellfish or roe etc | - |
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| seafowl | (noun) a bird that frequents coastal waters and the open ocean: gulls, pelicans, gannets, cormorants, albatrosses, petrels, etc. | Synonyms: sea bird, seabird |
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| seafront | (noun) the waterfront of a seaside town | - |
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| seagrass | (noun) any of various seaweeds that grow underwater in shallow beds | - |
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| seagull | (noun) mostly white aquatic bird having long pointed wings and short legs | Synonyms: gull, sea gull |
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| seahorse | (noun) small fish with horse-like heads bent sharply downward and curled tails; swim in upright position | Synonyms: sea horse |
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| (noun) either of two large northern marine mammals having ivory tusks and tough hide over thick blubber | Synonyms: sea horse, walrus |
| seal | (noun) any of numerous marine mammals that come on shore to breed; chiefly of cold regions | - |
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| (noun) a device incised to make an impression; used to secure a closing or to authenticate documents | Synonyms: stamp |
| (noun) fastener consisting of a resinous composition that is plastic when warm; used for sealing documents and parcels and letters | Synonyms: sealing wax |
| (noun) fastener that provides a tight and perfect closure | - |
| (noun) a finishing coat applied to exclude moisture | - |
| (noun) an indication of approved or superior status | Synonyms: cachet, seal of approval |
| (noun) a stamp affixed to a document (as to attest to its authenticity or to seal it) | - |
| (noun) the pelt or fur (especially the underfur) of a seal | Synonyms: sealskin |
| sealant | (noun) a kind of sealing material that is used to form a hard coating on a porous surface (as a coat of paint or varnish used to size a surface) | Synonyms: sealer |
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| sealer | (noun) an official who affixes a seal to a document | - |
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| (noun) a kind of sealing material that is used to form a hard coating on a porous surface (as a coat of paint or varnish used to size a surface) | Synonyms: sealant |
| sealing | (noun) the act of treating something to make it repel water | Synonyms: waterproofing |
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| sealskin | (noun) a garment (as a jacket or coat or robe) made of sealskin | - |
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| (noun) the pelt or fur (especially the underfur) of a seal | Synonyms: seal |
| seam | (noun) joint consisting of a line formed by joining two pieces | - |
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| (noun) a stratum of ore or coal thick enough to be mined with profit | Synonyms: bed |
| (noun) a slight depression or fold in the smoothness of a surface | Synonyms: crease, crinkle, furrow, line, wrinkle |
| seaman | (noun) a man who serves as a sailor | Synonyms: gob, Jack-tar, Jack, mariner, old salt, sea dog, seafarer, tar |
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| seamanship | (noun) skill in sailing | - |
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| seamount | (noun) an underwater mountain rising above the ocean floor | - |
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| seamster | (noun) a person whose occupation is making and altering garments | Synonyms: sartor, tailor |
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| seamstress | (noun) a woman who makes or mends dresses | Synonyms: modiste, needlewoman, sempstress |
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| seance | (noun) a meeting of spiritualists | Synonyms: session, sitting |
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| seaplane | (noun) an airplane that can land on or take off from water | Synonyms: hydroplane |
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| seaport | (noun) a sheltered port where ships can take on or discharge cargo | Synonyms: harbor, harbour, haven |
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| seaquake | (noun) an earthquake at the sea bed | Synonyms: submarine earthquake |
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| search | (noun) the activity of looking thoroughly in order to find something or someone | Synonyms: hunt, hunting |
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| (noun) boarding and inspecting a ship on the high seas | - |
| (noun) an investigation seeking answers | - |
| (noun) the examination of alternative hypotheses | - |
| (noun) an operation that determines whether one or more of a set of items has a specified property | Synonyms: lookup |
| searcher | (noun) large metallic blue-green beetle that preys on caterpillars; found in North America | Synonyms: Calosoma scrutator, searcher beetle |
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| (noun) someone making a search or inquiry | Synonyms: quester, seeker |
| (noun) a customs official whose job is to search baggage or goods or vehicles for contraband or dutiable items | - |
| searchlight | (noun) a light source with reflectors that projects a beam of light in a particular direction | - |
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| searobin | (noun) American gurnard; mostly found in bays and estuaries | Synonyms: sea robin |
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| seascape | (noun) a painting of the sea (as distinguished from a landscape) | Synonyms: waterscape |
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| (noun) a view of the sea | - |
| seashell | (noun) the shell of a marine organism | - |
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| seashore | (noun) the shore of a sea or ocean | Synonyms: coast, sea-coast, seacoast |
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| seasickness | (noun) motion sickness experienced while traveling on water | Synonyms: mal de mer, naupathia |
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| seaside | (noun) the shore of a sea or ocean regarded as a resort | Synonyms: seaboard |
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| seasnail | (noun) small tadpole-shaped cold-water fishes with pelvic fins forming a sucker; related to lumpfish | Synonyms: Liparis liparis, sea snail, snailfish |
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| (noun) any of several creeping marine gastropods with a spirally coiled shell: whelks, tritons, moon shells, neritids | - |
| season | (noun) one of the natural periods into which the year is divided by the equinoxes and solstices or atmospheric conditions | Synonyms: time of year |
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| (noun) a recurrent time marked by major holidays | - |
| (noun) a period of the year marked by special events or activities in some field | - |
| seasonableness | (noun) being at the right time | Synonyms: timeliness |
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| seasonal | (noun) a worker who finds employment only in certain seasons | Synonyms: seasonal worker |
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| seasoner | (noun) something added to food primarily for the savor it imparts | Synonyms: flavorer, flavoring, flavourer, flavouring, seasoning |
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| (noun) a cook who uses seasonings | - |
| seasoning | (noun) the act of adding a seasoning to food | - |
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| (noun) something added to food primarily for the savor it imparts | Synonyms: flavorer, flavoring, flavourer, flavouring, seasoner |
| seat | (noun) any support where you can sit (especially the part of a chair or bench etc. on which you sit) | - |
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| (noun) furniture that is designed for sitting on | - |
| (noun) the cloth covering for the buttocks | - |
| (noun) a part of a machine that supports or guides another part | - |
| (noun) the legal right to sit as a member in a legislative or similar body | - |
| (noun) the fleshy part of the human body that you sit on | Synonyms: arse, ass, backside, behind, bottom, bum, buns, butt, buttocks, can, derriere, fanny, fundament, hind end, hindquarters, keister, nates, posterior, prat, rear, rear end, rump, stern, tail, tail end, tooshie, tush |
| (noun) a center of authority (as a city from which authority is exercised) | - |
| (noun) a space reserved for sitting (as in a theater or on a train or airplane) | Synonyms: place |
| (noun) the location (metaphorically speaking) where something is based | - |
| seatbelt | (noun) a safety belt used in a car or plane to hold you in your seat in case of an accident | Synonyms: seat belt |
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| seating | (noun) the service of ushering people to their seats | - |
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| (noun) an area that includes places where several people can sit | Synonyms: seating area, seating room, seats |
| seats | (noun) an area that includes places where several people can sit | Synonyms: seating, seating area, seating room |
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| seawall | (noun) a protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away | Synonyms: breakwater, bulwark, groin, groyne, jetty, mole |
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| seaward | (noun) the direction toward the sea | - |
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| seawater | (noun) water containing salts | Synonyms: brine, saltwater |
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| seaway | (noun) a lane at sea that is a regularly used route for vessels | Synonyms: sea lane, ship route, trade route |
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| seaweed | (noun) plant growing in the sea, especially marine algae | - |
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| seaworthiness | (noun) fitness to traverse the seas | - |
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| seax | (noun) a type of sword or dagger typical of the Germanic peoples of the Migration period and the Early Middle Ages, especially the Saxons. | - |
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| seborrhea | (noun) a condition in which overactivity of the sebaceous glands causes the skin to become oily | - |
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| sebum | (noun) the oily secretion of the sebaceous glands; with perspiration it moistens and protects the skin | - |
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| sec | (noun) ratio of the hypotenuse to the adjacent side of a right-angled triangle | Synonyms: secant |
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| (noun) 1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites | Synonyms: s, second |
| secant | (noun) ratio of the hypotenuse to the adjacent side of a right-angled triangle | Synonyms: sec |
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| (noun) a straight line that intersects a curve at two or more points | - |
| secateurs | (noun) small pruning shears with a spring that holds the handles open and a single blade that closes against a flat surface | - |
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| secernment | (noun) the cognitive process whereby two or more stimuli are distinguished | Synonyms: discrimination |
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| (noun) the organic process of synthesizing and releasing some substance | Synonyms: secretion |
| secession | (noun) formal separation from an alliance or federation | Synonyms: withdrawal |
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| (noun) an Austrian school of art and architecture parallel to the French art nouveau in the 1890s | Synonyms: sezession |
| secessionism | (noun) a doctrine that maintains the right of secession | - |
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| secessionist | (noun) an advocate of secessionism | - |
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| seckel | (noun) small yellowish- to reddish-brown pear | Synonyms: seckel pear |
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| seclusion | (noun) the act of secluding yourself from others | - |
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| (noun) the quality of being secluded from the presence or view of others | Synonyms: privacy, privateness |
| secobarbital | (noun) barbiturate that is a white odorless slightly bitter powder (trade name Seconal) used as a sodium salt for sedation and to treat convulsions | Synonyms: red devil, secobarbital sodium, Seconal |
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| second | (noun) the fielding position of the player on a baseball team who is stationed near the second of the bases in the infield | Synonyms: second base |
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| (noun) the gear that has the second lowest forward gear ratio in the gear box of a motor vehicle | Synonyms: second gear |
| (noun) merchandise that has imperfections; usually sold at a reduced price without the brand name | Synonyms: irregular |
| (noun) a speech seconding a motion | Synonyms: endorsement, indorsement, secondment |
| (noun) the official attendant of a contestant in a duel or boxing match | - |
| (noun) a 60th part of a minute of arc | Synonyms: arcsecond |
| (noun) following the first in an ordering or series | - |
| (noun) 1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites | Synonyms: s, sec |
| (noun) an indefinitely short time | Synonyms: bit, minute, mo, moment |
| (noun) a particular point in time | Synonyms: instant, minute, moment |
| secondary | (noun) coil such that current is induced in it by passing a current through the primary coil | Synonyms: secondary coil, secondary winding |
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| (noun) the defensive football players who line up behind the linemen | - |
| seconder | (noun) someone who endorses a motion or petition as a necessary preliminary to a discussion or vote | - |
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| secondment | (noun) the detachment of a person from their regular organization for temporary assignment elsewhere | - |
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| (noun) a speech seconding a motion | Synonyms: endorsement, indorsement, second |
| secondo | (noun) the second or lower part of a duet (especially a piano duet) | - |
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| secpar | (noun) a unit of astronomical length based on the distance from Earth at which stellar parallax is 1 second of arc; equivalent to 3.262 light years | Synonyms: parsec |
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| secrecy | (noun) the trait of keeping things secret | Synonyms: secretiveness, silence |
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| (noun) the condition of being concealed or hidden | Synonyms: concealment, privacy, privateness |
| secret | (noun) something that baffles understanding and cannot be explained | Synonyms: closed book, enigma, mystery |
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| (noun) something that should remain hidden from others (especially information that is not to be passed on) | - |
| (noun) information known only to a special group | Synonyms: arcanum |
| secretaire | (noun) a desk used for writing | Synonyms: escritoire, secretary, writing table |
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| secretariat | (noun) an administrative unit responsible for maintaining records and other secretarial duties; especially for international organizations | Synonyms: secretariate |
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| secretariate | (noun) an administrative unit responsible for maintaining records and other secretarial duties; especially for international organizations | Synonyms: secretariat |
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| secretary | (noun) a desk used for writing | Synonyms: escritoire, secretaire, writing table |
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| (noun) an assistant who handles correspondence and clerical work for a boss or an organization | Synonyms: secretarial assistant |
| (noun) a person who is head of an administrative department of government | - |
| (noun) a person to whom a secret is entrusted | Synonyms: repository |
| secretaryship | (noun) the position of secretary | - |
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| secretase | (noun) a set of enzymes believed to snip pieces off a longer protein producing fragments of amyloid protein that bunch up and create amyloid protein plaques in brain tissue (the pathological hallmark of Alzheimer's) | - |
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| secreter | (noun) any of various organs that synthesize substances needed by the body and release it through ducts or directly into the bloodstream | Synonyms: gland, secretor, secretory organ |
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| secretin | (noun) a gastrointestinal hormone that stimulates the secretion of water and bicarbonate from the pancreas and bile ducts whenever the stomach empties too much acid into the small intestine | - |
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| secretion | (noun) a functionally specialized substance (especially one that is not a waste) released from a gland or cell | - |
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| (noun) the organic process of synthesizing and releasing some substance | Synonyms: secernment |
| secretiveness | (noun) characterized by a lack of openness (especially about one's actions or purposes) | Synonyms: closeness |
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| (noun) the trait of keeping things secret | Synonyms: secrecy, silence |
| secretor | (noun) any of various organs that synthesize substances needed by the body and release it through ducts or directly into the bloodstream | Synonyms: gland, secreter, secretory organ |
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| sect | (noun) a dissenting clique | Synonyms: faction |
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| (noun) a subdivision of a larger religious group | Synonyms: religious order, religious sect |
| sectarian | (noun) a member of a sect | Synonyms: sectarist, sectary |
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| sectarianism | (noun) a narrow-minded adherence to a particular sect or party or denomination | Synonyms: denominationalism |
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| sectarist | (noun) a member of a sect | Synonyms: sectarian, sectary |
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| sectary | (noun) a member of a sect | Synonyms: sectarian, sectarist |
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| section | (noun) the cutting of or into body tissues or organs (especially by a surgeon as part of an operation) | Synonyms: incision, surgical incision |
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| (noun) one of several parts or pieces that fit with others to constitute a whole object | Synonyms: segment |
| (noun) one of the portions into which something is regarded as divided and which together constitute a whole | Synonyms: division, part |
| (noun) a self-contained part of a larger composition (written or musical) | Synonyms: subdivision |
| (noun) a segment of a citrus fruit | - |
| (noun) a small army unit usually having a special function | - |
| (noun) a division of an orchestra containing all instruments of the same class | - |
| (noun) a small team of policemen working as part of a police platoon | - |
| (noun) a specialized division of a large organization | Synonyms: department |
| (noun) a small class of students who are part of a larger course but are taught separately | Synonyms: discussion section |
| (noun) (geometry) the area created by a plane cutting through a solid | Synonyms: plane section |
| (noun) a distinct region or subdivision of a territorial or political area or community or group of people | - |
| (noun) a very thin slice (of tissue or mineral or other substance) for examination under a microscope | - |
| (noun) a land unit equal to 1 square mile | - |
| sectional | (noun) a piece of furniture made up of sections that can be arranged individually or together | - |
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| sectionalisation | (noun) the act of dividing or partitioning; separation by the creation of a boundary that divides or keeps apart | Synonyms: division, partition, partitioning, sectionalization, segmentation |
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| sectionalism | (noun) a partiality for some particular place | Synonyms: localism, provincialism |
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| sectionalization | (noun) the act of dividing or partitioning; separation by the creation of a boundary that divides or keeps apart | Synonyms: division, partition, partitioning, sectionalisation, segmentation |
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| sector | (noun) measuring instrument consisting of two graduated arms hinged at one end | - |
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| (noun) a particular aspect of life or activity | Synonyms: sphere |
| (noun) a social group that forms part of the society or the economy | - |
| (noun) a portion of a military position | - |
| (noun) the minimum track length that can be assigned to store information; unless otherwise specified a sector of data consists of 512 bytes | - |
| (noun) a plane figure bounded by two radii and the included arc of a circle | - |
| secular | (noun) someone who is not a clergyman or a professional person | Synonyms: layman, layperson |
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| secularisation | (noun) transfer of property from ecclesiastical to civil possession | Synonyms: secularization |
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| (noun) the activity of changing something (art or education or society or morality etc.) so it is no longer under the control or influence of religion | Synonyms: secularization |