| 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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| 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 |
| 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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| bumboat | (noun) a small boat that ferries supplies and commodities for sale to a larger ship at anchor | - |
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| catboat | (noun) a sailboat with a single mast set far forward | - |
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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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| fireboat | (noun) a boat equipped to fight fires on ships or along a waterfront | - |
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| flatboat | (noun) a flatbottom boat for carrying heavy loads (especially on canals) | Synonyms: barge, hoy, lighter |
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| gunboat | (noun) a small shallow-draft boat carrying mounted guns; used by costal patrols | - |
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| houseboat | (noun) a barge that is designed and equipped for use as a dwelling | - |
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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 |
| 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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| 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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| motorboat | (noun) a boat propelled by an internal-combustion engine | Synonyms: powerboat |
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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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| pigboat | (noun) a submersible warship usually armed with torpedoes | Synonyms: sub, submarine |
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| powerboat | (noun) a boat propelled by an internal-combustion engine | Synonyms: motorboat |
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| rowboat | (noun) a small boat of shallow draft with cross thwarts for seats and rowlocks for oars with which it is propelled | Synonyms: dinghy, dory |
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| sailboat | (noun) a small sailing vessel; usually with a single mast | Synonyms: sailing boat |
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| sauceboat | (noun) a dish (often boat-shaped) for serving gravy or sauce | Synonyms: boat, gravy boat, gravy holder |
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| showboat | (noun) a river steamboat on which theatrical performances could be given (especially on the Mississippi River) | - |
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| speedboat | (noun) a fast motorboat | - |
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| steamboat | (noun) a boat propelled by a steam engine | - |
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| surfboat | (noun) a boat that can be launched or landed in heavy surf | - |
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| towboat | (noun) a powerful small boat designed to pull or push larger ships | Synonyms: tower, tug, tugboat |
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| tugboat | (noun) a powerful small boat designed to pull or push larger ships | Synonyms: towboat, tower, tug |
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| whaleboat | (noun) a long narrow boat designed for quick turning and use in rough seas | - |
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