Synonyms and Antonyms of u-boat

a submersible warship usually armed with torpedoes (noun.artifact)

a warship designed to operate under water (noun.artifact)

a military submarine designed and armed to attack enemy shipping (noun.artifact)

a submarine for research purposes (noun.artifact)

a submarine carrying ballistic missiles (noun.artifact)

a submarine that is propelled by nuclear power (noun.artifact)

a raised bridge on a submarine; often used for entering and exiting (noun.artifact)

hatchway that provides a means of escape in an emergency (noun.artifact)

an optical instrument that provides a view of an otherwise obstructed field (noun.artifact)

air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time (noun.artifact)

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 (noun.artifact)

beneath the surface of the sea (adj.all)