| 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 |
| balboa | (noun) the basic unit of money in Panama; equal to 100 centesimos | - |
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| bareboat | (noun) a vessel (such as a yacht) that can be chartered without a captain or crew or provisions | - |
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| bareboating | (noun) boating by chartering a bareboat and providing your own crew and provisions | - |
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| 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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| blackboard | (noun) sheet of slate; for writing with chalk | Synonyms: chalkboard |
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| boa | (noun) any of several chiefly tropical constrictors with vestigial hind limbs | - |
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| (noun) a long thin fluffy scarf of feathers or fur | Synonyms: feather boa |
| 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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| boast | (noun) speaking of yourself in superlatives | Synonyms: boasting, jactitation, self-praise |
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| (verb) show off | Synonyms: blow, bluster, brag, gas, gasconade, shoot a line, swash, tout, vaunt |
| (verb) wear or display in an ostentatious or proud manner | Synonyms: feature, sport |
| boaster | (noun) a very boastful and talkative person | Synonyms: blowhard, braggart, bragger, line-shooter, vaunter |
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| boastful | (adjective) exhibiting self-importance | Synonyms: big, braggart, bragging, braggy, cock-a-hoop, crowing, self-aggrandising, self-aggrandizing |
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| boastfully | (adverb) in a boastful manner | Synonyms: big, large, vauntingly |
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| boastfulness | (noun) outspoken conceit | Synonyms: vainglory |
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| boasting | (noun) speaking of yourself in superlatives | Synonyms: boast, jactitation, self-praise |
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| boat | (noun) a small vessel for travel on water | - |
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| (noun) a dish (often boat-shaped) for serving gravy or sauce | Synonyms: gravy boat, gravy holder, sauceboat |
| (verb) ride in a boat on water | - |
| boatbill | (noun) tropical American heron related to night herons | Synonyms: boat-billed heron, broadbill, Cochlearius cochlearius |
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| boatbuilder | (noun) a person who builds boats | - |
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| boater | (noun) a stiff hat made of straw with a flat crown | Synonyms: leghorn, Panama, Panama hat, sailor, skimmer, straw hat |
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| (noun) someone who drives or rides in a boat | Synonyms: boatman, waterman |
| boathouse | (noun) a shed at the edge of a river or lake; used to store boats | - |
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| boating | (noun) water travel for pleasure | Synonyms: yachting |
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| boatload | (noun) the amount of cargo that can be held by a boat or ship or a freight car | Synonyms: carload, shipload |
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| boatman | (noun) someone who drives or rides in a boat | Synonyms: boater, waterman |
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| boatmanship | (noun) skill in handling boats | - |
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| boatswain | (noun) a petty officer on a merchant ship who controls the work of other seamen | Synonyms: bo's'n, bo'sun, bos'n, bosun |
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| boatyard | (noun) a place where boats are built or maintained or stored | - |
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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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| bumboat | (noun) a small boat that ferries supplies and commodities for sale to a larger ship at anchor | - |
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| cardboard | (adjective) without substance | Synonyms: unlifelike |
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| (noun) a stiff moderately thick paper | Synonyms: composition board |
| catboat | (noun) a sailboat with a single mast set far forward | - |
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| 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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| 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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| 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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| ferryboat | (noun) a boat that transports people or vehicles across a body of water and operates on a regular schedule | Synonyms: ferry |
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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 |
| fireboat | (noun) a boat equipped to fight fires on ships or along a waterfront | - |
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| 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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| flatboat | (noun) a flatbottom boat for carrying heavy loads (especially on canals) | Synonyms: barge, hoy, lighter |
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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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| gunboat | (noun) a small shallow-draft boat carrying mounted guns; used by costal patrols | - |
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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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| houseboat | (noun) a barge that is designed and equipped for use as a dwelling | - |
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| hoverboard | (noun) A device resembling a skateboard without wheels that can hover above the ground | - |
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| iceboat | (noun) a ship with a reinforced bow to break up ice and keep channels open for navigation | Synonyms: icebreaker |
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| (noun) a sailing vessel with runners and a cross-shaped frame; suitable for traveling over ice | Synonyms: ice yacht, scooter |
| inboard | (adjective) located within the hull or nearest the midline of a vessel or aircraft | - |
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| jerboa | (noun) mouselike jumping rodent | - |
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| jeroboam | (noun) a large wine bottle (holds 4/5 of a gallon) | Synonyms: double-magnum |
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| keelboat | (noun) river boat with a shallow draught and a keel but no sails; used to carry freight; moved by rowing or punting or towing | - |
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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 |
| lifeboat | (noun) a strong sea boat designed to rescue people from a sinking ship | - |
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| longboat | (noun) the largest boat carried by a merchant sailing vessel | - |
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| mailboat | (noun) a boat for carrying mail | Synonyms: mail boat, packet, packet boat |
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| 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 |
| motorboat | (noun) a boat propelled by an internal-combustion engine | Synonyms: powerboat |
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| (verb) ride in a motorboat | - |
| mouldboard | (noun) wedge formed by the curved part of a steel plow blade that turns the furrow | Synonyms: moldboard |
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| narrowboat | (noun) a long boat that carries freight and is narrow enough to be used in canals | Synonyms: canal boat, narrow boat |
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