| irregular | (noun) merchandise that has imperfections; usually sold at a reduced price without the brand name | Synonyms: second |
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| (noun) a member of an irregular armed force that fights a stronger force by sabotage and harassment | Synonyms: guerilla, guerrilla, insurgent |
| isobar | (noun) (meteorology)an isogram connecting points having equal barometric pressure at a given time | - |
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| izar | (noun) a voluminous cotton outer garment (usually white) traditionally worn by Muslim women of northern Africa and the Middle East; covers the entire body | - |
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| jacamar | (noun) tropical American insectivorous bird having a long sharp bill and iridescent green or bronze plumage | - |
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| jaguar | (noun) a large spotted feline of tropical America similar to the leopard; in some classifications considered a member of the genus Felis | Synonyms: Felis onca, panther, Panthera onca |
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| jamjar | (noun) a jar for holding jellies or preserves | Synonyms: jampot |
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| jar | (noun) a cylindrical vessel, typically used for storing food | - |
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| (noun) a sudden jarring impact | Synonyms: jolt, jounce, shock |
| (noun) the quantity contained in a jar | Synonyms: jarful |
| jugular | (noun) a vital part that is vulnerable to attack | - |
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| (noun) veins in the neck that return blood from the head | Synonyms: jugular vein, vena jugularis |
| justiciar | (noun) formerly a high judicial officer | Synonyms: justiciary |
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| khaddar | (noun) a coarse homespun cotton cloth made in India | Synonyms: khadi |
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| khimar | (noun) a headscarf worn by observant Muslim women that hangs down to just above the waist | - |
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| knitwear | (noun) knitted clothing | - |
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| lacunar | (noun) an ornamental sunken panel in a ceiling or dome | Synonyms: caisson, coffer |
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| lahar | (noun) an avalanche of volcanic water and mud down the slopes of a volcano | - |
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| lascar | (noun) an East Indian sailor | - |
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| lazar | (noun) a person afflicted with leprosy | Synonyms: leper |
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| lekvar | (noun) a sweet filling made of prunes or apricots | - |
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| liar | (noun) a person who has lied or who lies repeatedly | Synonyms: prevaricator |
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| lidar | (noun) a measuring system that detects and locates objects on the same principle as radar but uses light from a laser; a potential technology for detecting air turbulence that can affect aircraft | - |
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| liquidambar | (noun) any tree of the genus Liquidambar | - |
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| (noun) aromatic exudate from the sweet gum tree | Synonyms: sweet gum |
| loadstar | (noun) something that serves as a model or guide | Synonyms: lodestar |
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| (noun) guiding star; a star that is used as a reference point in navigation or astronomy | Synonyms: lodestar |
| lodestar | (noun) something that serves as a model or guide | Synonyms: loadstar |
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| (noun) guiding star; a star that is used as a reference point in navigation or astronomy | Synonyms: loadstar |
| lontar | (noun) tall fan palm of Africa and India and Malaysia yielding a hard wood and sweet sap that is a source of palm wine and sugar; leaves used for thatching and weaving | Synonyms: Borassus flabellifer, longar palm, palmyra, palmyra palm, toddy palm, wine palm |
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| loungewear | (noun) clothing suitable for relaxation | - |
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| louvar | (noun) large silvery fish found worldwide in warm seas but nowhere common; resembles a whale and feeds on plankton | Synonyms: Luvarus imperialis |
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| maar | (noun) a flat-bottomed volcanic crater that was formed by an explosion; often filled with water | - |
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| malar | (noun) the arch of bone beneath the eye that forms the prominence of the cheek | Synonyms: cheekbone, jugal bone, malar bone, os zygomaticum, zygomatic, zygomatic bone |
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| mar | (noun) a mark or flaw that spoils the appearance of something (especially on a person's body) | Synonyms: blemish, defect |
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| medlar | (noun) crabapple-like fruit used for preserves | - |
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| (noun) a South African globular fruit with brown leathery skin and pithy flesh having a sweet-acid taste | - |
| (noun) small deciduous Eurasian tree cultivated for its fruit that resemble crab apples | Synonyms: medlar tree, Mespilus germanica |
| (noun) small deciduous tree of southern Africa having edible fruit | Synonyms: Vangueria infausta, wild medlar, wild medlar tree |
| microbar | (noun) the absolute unit of pressure equal to one dyne per square centimeter | Synonyms: bar absolute, barye |
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| millibar | (noun) a unit of atmospheric pressure equal to one thousandth of a bar | - |
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| minibar | (noun) sideboard with compartments for holding bottles | Synonyms: cellaret |
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| minicar | (noun) a car that is even smaller than a subcompact car | - |
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| molar | (noun) grinding tooth with a broad crown; located behind the premolars | Synonyms: grinder |
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| mortar | (noun) a muzzle-loading high-angle gun with a short barrel that fires shells at high elevations for a short range | Synonyms: howitzer, trench mortar |
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| (noun) a bowl-shaped vessel in which substances can be ground and mixed with a pestle | - |
| (noun) used as a bond in masonry or for covering a wall | - |
| motorcar | (noun) a motor vehicle with four wheels; usually propelled by an internal combustion engine | Synonyms: auto, automobile, car, machine |
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| narcodollar | (noun) money (especially in the form of US dollars) obtained from narcotrafficking. | Synonyms: narco-dollar |
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| navicular | (noun) the largest wrist bone on the thumb side | Synonyms: os scaphoideum, scaphoid bone |
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| nebuchadnezzar | (noun) a very large wine bottle holding the equivalent of 20 normal bottles of wine; used especially for display | - |
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| neckwear | (noun) articles of clothing worn about the neck | - |
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| nectar | (noun) (classical mythology) the food and drink of the gods; mortals who ate it became immortal | Synonyms: ambrosia |
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| (noun) fruit juice especially when undiluted | - |
| (noun) a sweet liquid secretion that is attractive to pollinators | - |
| nightjar | (noun) mainly crepuscular or nocturnal nonpasserine birds with mottled greyish-brown plumage and large eyes; feed on insects | Synonyms: caprimulgid, goatsucker |
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| nightwear | (noun) garments designed to be worn in bed | Synonyms: nightclothes, sleepwear |
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| oar | (noun) an implement used to propel or steer a boat | - |
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| ocular | (noun) combination of lenses at the viewing end of optical instruments | Synonyms: eyepiece |
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| ottar | (noun) essential oil or perfume obtained from flowers | Synonyms: atar, athar, attar |
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| outerwear | (noun) clothing for use outdoors | Synonyms: overclothes |
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| pandar | (noun) someone who procures customers for whores (in England they call a pimp a ponce) | Synonyms: fancy man, pander, panderer, pimp, ponce, procurer |
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| par | (noun) (golf) the standard number of strokes set for each hole on a golf course, or for the entire course | - |
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| (noun) a state of being essentially equal or equivalent; equally balanced | Synonyms: equality, equation, equivalence |
| particular | (noun) a fact about some part (as opposed to general) | Synonyms: specific |
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| (noun) (logic) a proposition that asserts something about some (but not all) members of a class | Synonyms: particular proposition |
| (noun) a small part that can be considered separately from the whole | Synonyms: detail, item |
| pear | (noun) sweet juicy gritty-textured fruit available in many varieties | - |
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| (noun) Old World tree having sweet gritty-textured juicy fruit; widely cultivated in many varieties | Synonyms: pear tree, Pyrus communis |
| pedlar | (noun) someone who travels about selling his wares (as on the streets or at carnivals) | Synonyms: hawker, packman, peddler, pitchman |
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| perpendicular | (noun) an extremely steep face | - |
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| (noun) a cord from which a metal weight is suspended pointing directly to the earth's center of gravity; used to determine the vertical from a given point | Synonyms: plumb line |
| (noun) a Gothic style in 14th and 15th century England; characterized by vertical lines and a four-centered (Tudor) arch and fan vaulting | Synonyms: English-Gothic, English-Gothic architecture, perpendicular style |
| (noun) a straight line at right angles to another line | - |
| pillar | (noun) (architecture) a tall vertical cylindrical structure standing upright and used to support a structure | Synonyms: column |
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| (noun) a vertical cylindrical structure standing alone and not supporting anything (such as a monument) | Synonyms: column |
| (noun) a fundamental principle or practice | - |
| (noun) a prominent supporter | Synonyms: mainstay |
| (noun) anything that approximates the shape of a column or tower | Synonyms: column, tower |
| polestar | (noun) the brightest star in Ursa Minor; at the end of the handle of the Little Dipper; the northern axis of the earth points toward it | Synonyms: North Star, polar star, Polaris, pole star |
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| poplar | (noun) any of numerous trees of north temperate regions having light soft wood and flowers borne in catkins | Synonyms: poplar tree |
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| (noun) soft light-colored non-durable wood of the poplar | - |
| postalveolar | (noun) (phonetics) Any sound articulated with the tongue near or touching the back of the alveolar ridge. | Synonyms: post-alveolar, post-alveolar consonant, postalveolar consonant |
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| premolar | (noun) a tooth having two cusps or points; located between the incisors and the molars | Synonyms: bicuspid |
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| proseminar | (noun) a course of study like a graduate seminar but often open to advanced undergraduates. | - |
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| pulsar | (noun) a degenerate neutron star; small and extremely dense; rotates very fast and emits regular pulses of polarized radiation | - |
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| qintar | (noun) 100 qindarka equal 1 lek in Albania | Synonyms: qindarka |
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| quasar | (noun) a starlike object that may send out radio waves and other forms of energy; many have large red shifts | Synonyms: quasi-stellar radio source |
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| radar | (noun) measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects | Synonyms: microwave radar, radio detection and ranging, radiolocation |
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| railcar | (noun) a wheeled vehicle adapted to the rails of railroad | Synonyms: car, railroad car, railway car |
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| realgar | (noun) a rare soft orange mineral consisting of arsenic sulphide; an important ore of arsenic | - |
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| rear | (noun) the side that goes last or is not normally seen | Synonyms: back |
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| (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 end, rump, seat, stern, tail, tail end, tooshie, tush |
| (noun) the back of a military formation or procession | - |
| (noun) the side of an object that is opposite its front | Synonyms: back end, backside |
| (noun) the part of something that is furthest from the normal viewer | Synonyms: back |
| registrar | (noun) someone responsible for keeping records | Synonyms: record-keeper, recorder |
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| (noun) the administrator responsible for student records | - |
| (noun) a person employed to keep a record of the owners of stocks and bonds issued by the company | - |
| regular | (noun) a garment size for persons of average height and weight | - |
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| (noun) a regular patron | Synonyms: fixture, habitue |
| (noun) a dependable follower (especially in party politics) | - |
| (noun) a soldier in the regular army | - |
| roar | (noun) a very loud utterance (like the sound of an animal) | Synonyms: bellow, bellowing, holla, holler, hollering, hollo, holloa, roaring, yowl |
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| (noun) a deep prolonged loud noise | Synonyms: boom, roaring, thunder |
| (noun) the sound made by a lion | - |
| saltcellar | (noun) a small container for holding salt at the dining table | - |
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| salwar | (noun) a pair of light loose trousers with a tight fit around the ankles; worn by women from the Indian subcontinent (usually with a kameez) | Synonyms: shalwar |
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| sambar | (noun) a deer of southern Asia with antlers that have three tines | Synonyms: Cervus unicolor, sambur |
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| samovar | (noun) a metal urn with a spigot at the base; used in Russia to boil water for tea | - |
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| sandbar | (noun) a bar of sand | Synonyms: sand bar |
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| scalar | (noun) a variable quantity that cannot be resolved into components | - |
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| scapular | (noun) a feather covering the shoulder of a bird | - |
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| (noun) garment consisting of a long wide piece of woolen cloth worn over the shoulders with an opening for the head; part of a monastic habit | Synonyms: scapulary |
| scar | (noun) an indication of damage | Synonyms: mark, scrape, scratch |
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| (noun) a mark left (usually on the skin) by the healing of injured tissue | Synonyms: cicatrice, cicatrix |
| schmear | (noun) (Yiddish) a batch of things that go together | Synonyms: schmeer, shmear |
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| scholar | (noun) a learned person; someone who by long study has gained mastery in one or more disciplines | Synonyms: bookman, scholarly person |
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| (noun) someone (especially a child) who learns (as from a teacher) or takes up knowledge or beliefs | Synonyms: assimilator, learner, student |
| (noun) a student who holds a scholarship | - |
| scimitar | (noun) a curved oriental saber; the edge is on the convex side of the blade | - |
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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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| secular | (noun) someone who is not a clergyman or a professional person | Synonyms: layman, layperson |
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| seminar | (noun) a course offered for a small group of advanced students | - |
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| (noun) any meeting for an exchange of ideas | - |
| shalwar | (noun) a pair of light loose trousers with a tight fit around the ankles; worn by women from the Indian subcontinent (usually with a kameez) | Synonyms: salwar |
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| shear | (noun) a large edge tool that cuts sheet metal by passing a blade through it | - |
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| (noun) (physics) a deformation of an object in which parallel planes remain parallel but are shifted in a direction parallel to themselves | - |
| shmear | (noun) (Yiddish) a batch of things that go together | Synonyms: schmear, schmeer |
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| shofar | (noun) an ancient musical horn made from the horn of a ram; used in ancient times by the Israelites to sound a warning or a summons; used in synagogues today on solemn occasions | Synonyms: shophar |
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| shophar | (noun) an ancient musical horn made from the horn of a ram; used in ancient times by the Israelites to sound a warning or a summons; used in synagogues today on solemn occasions | Synonyms: shofar |
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| sidebar | (noun) (law) a courtroom conference between the lawyers and the judge that is held out of the jury's hearing | - |
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| (noun) a short news story presenting sidelights on a major story | - |
| sidecar | (noun) conveyance consisting of a small carrier attached to the side of a motorcycle | - |
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| (noun) a cocktail made of orange liqueur with lemon juice and brandy | - |
| singular | (noun) the form of a word that is used to denote a singleton | Synonyms: singular form |
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| sirdar | (noun) an important person in India | - |
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| sitar | (noun) a stringed instrument of India; has a long neck and movable frets; has 6 or 7 metal strings for playing and usually 13 resonating strings | - |
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| sleepwear | (noun) garments designed to be worn in bed | Synonyms: nightclothes, nightwear |
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| smear | (noun) an act that brings discredit to the person who does it | Synonyms: blot, smirch, spot, stain |
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| (noun) a blemish made by dirt | Synonyms: blot, daub, slur, smirch, smudge, spot |
| (noun) a thin tissue or blood sample spread on a glass slide and stained for cytologic examination and diagnosis under a microscope | Synonyms: cytologic smear, cytosmear |
| (noun) slanderous defamation | Synonyms: malignment, vilification |
| soar | (noun) the act of rising upward into the air | Synonyms: zoom |
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| solebar | (noun) one of the longitudinal beams running along either side of a railway vehicle, onto which the bodywork is mounted, in passenger-carrying vehicles usually forming the side or the base of the floor. | Synonyms: side sill |
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| sonar | (noun) a measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return | Synonyms: asdic, echo sounder |
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| spar | (noun) making the motions of attack and defense with the fists and arms; a part of training for a boxer | Synonyms: sparring |
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| (noun) a stout rounded pole of wood or metal used to support rigging | - |
| (noun) any of various nonmetallic minerals (calcite or feldspar) that are light in color and transparent or translucent and cleavable | - |
| spear | (noun) a long pointed rod used as a tool or weapon | Synonyms: lance, shaft |
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| (noun) an implement with a shaft and barbed point used for catching fish | Synonyms: fishgig, fizgig, gig, lance |