| aboard | (adverb) on first or second or third base | - |
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| (adverb) on a ship, train, plane or other vehicle | Synonyms: on board |
| (adverb) part of a group | - |
| (adverb) side by side | Synonyms: alongside |
| aboveboard | (adjective) without concealment or deception; honest | Synonyms: straightforward |
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| (adverb) in an honest manner | Synonyms: honestly |
| backboard | (noun) a board used to support the back of someone or something | - |
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| (noun) a raised vertical board with basket attached; used to play basketball | Synonyms: basketball backboard |
| baseboard | (noun) a molding covering the joint formed by a wall and the floor | Synonyms: mopboard, skirting board |
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| billboard | (noun) large outdoor signboard | Synonyms: hoarding |
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| bioarm | (noun) any weapon usable in biological warfare | Synonyms: biological weapon, bioweapon |
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| blackboard | (noun) sheet of slate; for writing with chalk | Synonyms: chalkboard |
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| boar | (noun) an uncastrated male hog | - |
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| (noun) Old World wild swine having a narrow body and prominent tusks from which most domestic swine come; introduced in United States | Synonyms: Sus scrofa, wild boar |
| board | (noun) a flat piece of material designed for a special purpose | - |
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| (noun) a table at which meals are served | Synonyms: dining table |
| (noun) electrical device consisting of a flat insulated surface that contains switches and dials and meters for controlling other electrical devices | Synonyms: control board, control panel, instrument panel, panel |
| (noun) a vertical surface on which information can be displayed to public view | Synonyms: display board, display panel |
| (noun) a printed circuit that can be inserted into expansion slots in a computer to increase the computer's capabilities | Synonyms: add-in, card, circuit board, circuit card, plug-in |
| (noun) a flat portable surface (usually rectangular) designed for board games | Synonyms: gameboard |
| (noun) food or meals in general | Synonyms: table |
| (noun) a committee having supervisory powers | - |
| (noun) a stout length of sawn timber; made in a wide variety of sizes and used for many purposes | Synonyms: plank |
| (verb) provide food and lodging (for) | - |
| (verb) lodge and take meals (at) | - |
| (verb) get on board of (trains, buses, ships, aircraft, etc.) | Synonyms: get on |
| (verb) live and take one's meals at or in | Synonyms: room |
| boarder | (noun) a tenant in someone's house | Synonyms: lodger, roomer |
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| (noun) a pupil who lives at school during term time | - |
| (noun) someone who forces their way aboard ship | - |
| boarding | (noun) the act of passengers and crew getting aboard a ship or aircraft | Synonyms: embarkation, embarkment |
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| (noun) a structure of boards | - |
| boardinghouse | (noun) a private house that provides accommodations and meals for paying guests | Synonyms: boarding house |
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| boardroom | (noun) a room where a committee meets (such as the board of directors of a company) | Synonyms: council chamber |
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| boards | (noun) (used in the plural) the boarding that surrounds an ice hockey rink | - |
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| (noun) (used in the plural) the stage of a theater | - |
| boardwalk | (noun) a walkway made of wooden boards; usually at seaside | - |
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| boarfish | (noun) fish with a projecting snout | Synonyms: Capros aper |
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| (noun) fish with large eyes and long snouts | - |
| boarhound | (noun) large hound used in hunting wild boars | - |
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| breadboard | (noun) a wooden or plastic board on which dough is kneaded or bread is sliced | Synonyms: bread board |
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| buckboard | (noun) an open horse-drawn carriage with four wheels; has a seat attached to a flexible board between the two axles | - |
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| cardboard | (adjective) without substance | Synonyms: unlifelike |
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| (noun) a stiff moderately thick paper | Synonyms: composition board |
| centerboard | (noun) a retractable fin keel used on sailboats to prevent drifting to leeward | Synonyms: centreboard, drop keel, sliding keel |
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| centreboard | (noun) a retractable fin keel used on sailboats to prevent drifting to leeward | Synonyms: centerboard, drop keel, sliding keel |
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| chalkboard | (noun) sheet of slate; for writing with chalk | Synonyms: blackboard |
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| checkerboard | (noun) a board having 64 squares of two alternating colors | Synonyms: checker board, chequerboard |
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| cheeseboard | (noun) tray on which cheeses are served | Synonyms: cheese tray |
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| chequerboard | (noun) a board having 64 squares of two alternating colors | Synonyms: checker board, checkerboard |
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| chessboard | (noun) a checkerboard used to play chess | Synonyms: chess board |
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| chipboard | (noun) a cheap hard material made from wood chips that are pressed together and bound with synthetic resin | Synonyms: hardboard |
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| clapboard | (noun) a long thin board with one edge thicker than the other; used as siding by lapping one board over the board below | Synonyms: weatherboard, weatherboarding |
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| (verb) cover with clapboards | - |
| clapperboard | (noun) photographic equipment used to synchronize sound and motion picture; boards held in front of a movie camera are banged together | - |
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| clipboard | (noun) a small writing board with a clip at the top for holding papers | - |
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| coarctate | (adjective) (of an insect pupa) enclosed in a rigid case | - |
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| coarctation | (noun) (biology) a narrowing or constriction of a vessel or canal; especially a congenital narrowing of the aorta | - |
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| (noun) tight or narrow compression | Synonyms: constriction |
| coarse | (adjective) of textures that are rough to the touch or substances consisting of relatively large particles | Synonyms: harsh |
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| (adjective) of low or inferior quality or value | Synonyms: common |
| (adjective) lacking refinement or cultivation or taste | Synonyms: common, rough-cut, uncouth, vulgar |
| coarsely | (adverb) in coarse pieces | - |
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| coarsen | (verb) make less subtle or refined | - |
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| (verb) make or become coarse or coarser | - |
| coarsened | (adjective) made coarse or crude by lack of skill | - |
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| coarseness | (noun) looseness or roughness in texture (as of cloth) | Synonyms: nubbiness, tweediness |
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| (noun) the quality of being composed of relatively large particles | Synonyms: graininess, granularity |
| (noun) the quality of lacking taste and refinement | Synonyms: commonness, grossness, raunch, vulgarism, vulgarity |
| (noun) language or humor that is down-to-earth | Synonyms: saltiness |
| corkboard | (noun) a heat-insulating building material consisting of cork granules that are made into sheets by compressing and baking | - |
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| cupboard | (noun) a small room (or recess) or cabinet used for storage space | Synonyms: closet |
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| cytoarchitectonic | (adjective) of or relating to cytoarchitecture | Synonyms: cytoarchitectural |
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| cytoarchitectonics | (noun) the cellular composition of a bodily structure | Synonyms: cytoarchitecture |
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| cytoarchitectural | (adjective) of or relating to cytoarchitecture | Synonyms: cytoarchitectonic |
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| cytoarchitecture | (noun) the cellular composition of a bodily structure | Synonyms: cytoarchitectonics |
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| daggerboard | (noun) a removable centerboard on a small sailboat that can be lowered into the water to serve as a keel | - |
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| dartboard | (noun) a circular board of wood or cork used as the target in the game of darts | Synonyms: dart board |
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| dashboard | (noun) instrument panel on an automobile or airplane containing dials and controls | Synonyms: fascia |
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| (noun) protective covering consisting of a panel to protect people from the splashing water or mud etc. | Synonyms: splashboard, splasher |
| drainboard | (noun) a board beside a kitchen sink and inclined to drain into the sink | Synonyms: draining board |
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| duckboard | (noun) a boardwalk laid across muddy ground | - |
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| fallboard | (noun) the hinged protective covering that protects the keyboard of a piano when it is not being played | Synonyms: fall-board |
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| fiberboard | (noun) wallboard composed of wood chips or shavings bonded together with resin and compressed into rigid sheets | Synonyms: fibreboard, particle board |
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| fibreboard | (noun) wallboard composed of wood chips or shavings bonded together with resin and compressed into rigid sheets | Synonyms: fiberboard, particle board |
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| fingerboard | (noun) a narrow strip of wood on the neck of some stringed instruments (violin or cello or guitar etc) where the strings are held against the wood with the fingers | - |
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| (noun) a bank of keys on a musical instrument | Synonyms: clavier, piano keyboard |
| (noun) a guidepost resembling a hand with a pointing index finger | Synonyms: fingerpost |
| flashboard | (noun) boarding place along the top of a dam to increase its height | Synonyms: flashboarding |
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| flashboarding | (noun) boarding place along the top of a dam to increase its height | Synonyms: flashboard |
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| floorboard | (noun) a board in the floor | Synonyms: floor board |
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| (noun) the floor of an automobile | - |
| footboard | (noun) a vertical board or panel forming the foot of a bedstead | - |
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| (noun) a narrow platform on which to stand or brace the feet | - |
| gameboard | (noun) a flat portable surface (usually rectangular) designed for board games | Synonyms: board |
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| gangboard | (noun) a temporary bridge for getting on and off a vessel at dockside | Synonyms: gangplank, gangway |
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| garboard | (noun) the first wale laid next to the keel of a wooden ship | Synonyms: garboard plank, garboard strake |
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| hardboard | (noun) a cheap hard material made from wood chips that are pressed together and bound with synthetic resin | Synonyms: chipboard |
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| headboard | (noun) a vertical board or panel forming the head of a bedstead | - |
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| highboard | (noun) a high diving board | - |
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| hoar | (adjective) showing characteristics of age, especially having grey or white hair | Synonyms: gray-haired, gray-headed, gray, grey-haired, grey-headed, grey, grizzly, hoary, white-haired |
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| (noun) ice crystals forming a white deposit (especially on objects outside) | Synonyms: frost, hoarfrost, rime |
| hoard | (noun) a secret store of valuables or money | Synonyms: cache, stash |
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| (verb) get or gather together | Synonyms: accumulate, amass, collect, compile, pile up, roll up |
| (verb) save up as for future use | Synonyms: cache, hive up, lay away, squirrel away, stash |
| hoarder | (noun) a person who accumulates things and hides them away for future use | - |
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| hoarding | (noun) large outdoor signboard | Synonyms: billboard |
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| hoarfrost | (noun) ice crystals forming a white deposit (especially on objects outside) | Synonyms: frost, hoar, rime |
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| hoariness | (noun) great age (especially grey or white with age) | - |
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| (noun) a silvery-white color | Synonyms: frostiness |
| hoarse | (adjective) deep and harsh sounding as if from shouting or illness or emotion | Synonyms: gruff, husky |
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| hoarsely | (adverb) in a hoarse or husky voice | Synonyms: huskily |
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| hoarseness | (noun) a throaty harshness | Synonyms: gruffness, huskiness |
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| hoary | (adjective) covered with fine whitish hairs or down | Synonyms: canescent |
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| (adjective) ancient | Synonyms: rusty |
| (adjective) showing characteristics of age, especially having grey or white hair | Synonyms: gray-haired, gray-headed, gray, grey-haired, grey-headed, grey, grizzly, hoar, white-haired |
| hoverboard | (noun) A device resembling a skateboard without wheels that can hover above the ground | - |
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| inboard | (adjective) located within the hull or nearest the midline of a vessel or aircraft | - |
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| keyboard | (noun) holder consisting of an arrangement of hooks on which keys or locks can be hung | - |
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| (noun) device consisting of a set of keys on a piano or organ or typewriter or typesetting machine or computer or the like | - |
| keyboardist | (noun) a musician who plays a keyboard instrument | - |
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| lapboard | (noun) writing board used on the lap as a table or desk | - |
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| larboard | (adjective) located on the left side of a ship or aircraft | Synonyms: port |
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| (noun) the left side of a ship or aircraft to someone who is aboard and facing the bow or nose | Synonyms: port |
| matchboard | (noun) a board that has a groove cut into one edge and a tongue cut into the other so they fit tightly together (as in a floor) | - |
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| millboard | (noun) stout pasteboard used to bind books | - |
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| moldboard | (noun) wedge formed by the curved part of a steel plow blade that turns the furrow | Synonyms: mouldboard |
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| mopboard | (noun) a molding covering the joint formed by a wall and the floor | Synonyms: baseboard, skirting board |
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| mortarboard | (noun) an academic cap with a flat square with a tassel on top | - |
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| (noun) a square board with a handle underneath; used by masons to hold or carry mortar | Synonyms: hawk |
| mouldboard | (noun) wedge formed by the curved part of a steel plow blade that turns the furrow | Synonyms: moldboard |
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| oar | (noun) an implement used to propel or steer a boat | - |
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| oarfish | (noun) thin deep-water tropical fish 20 to 30 feet long having a red dorsal fin | Synonyms: king of the herring, Regalecus glesne, ribbonfish |
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| oarlock | (noun) a holder attached to the gunwale of a boat that holds the oar in place and acts as a fulcrum for rowing | Synonyms: peg, pin, rowlock, thole, tholepin |
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| oarsman | (noun) a male who rows a boat | - |
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| oarsmanship | (noun) skill as an oarsman | - |
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| oarswoman | (noun) a woman oarsman | - |
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| osteoarthritis | (noun) chronic breakdown of cartilage in the joints; the most common form of arthritis occurring usually after middle age | Synonyms: degenerative arthritis, degenerative joint disease |
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| outboard | (adjective) located away from the midline of a vessel or aircraft | - |
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| (noun) internal-combustion engine that mounts at stern of small boat | Synonyms: outboard motor |
| (noun) a motorboat with an outboard motor | Synonyms: outboard motorboat |
| outroar | (verb) roar louder than | - |
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| overboard | (adverb) from on board a vessel into the water | - |
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| (adverb) to extremes | - |
| paperboard | (noun) a cardboard suitable for making posters | Synonyms: poster board, posterboard |
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| pasteboard | (noun) stiff cardboard made by pasting together layers of paper | - |
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| patchboard | (noun) telephone central where circuits are completed with patchcords | Synonyms: plugboard, switchboard |
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| pegboard | (noun) a board perforated with regularly spaced holes into which pegs can be fitted | - |
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| plasterboard | (noun) wallboard with a gypsum plaster core bonded to layers of paper or fiberboard; used instead of plaster or wallboard to make interior walls | Synonyms: gypsum board |
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