U-boat, n.
a submersible warship usually armed with torpedoes
<noun.artifact> freq. cnt.: 7 freq. cnt.: 7
U-boat pigboat sub submarine
lexical pointers
derivationally related form
semantic pointers
hyponym
attack submarine
auxiliary research submarine
fleet ballistic missile submarine
nautilus, nuclear submarine, nuclear-powered submarine
part meronym
conning tower
escape hatch
periscope
snorkel, schnorkel, schnorchel, snorkel breather, breather
sonar, echo sounder, asdic
hypernym