Topic:armed forcesarmed servicesmilitarymilitary machinewar machine
Hypernyms:U-boat pigboat sub submarine
Inherited Hypernyms:attack submarinesubmarinesubmersiblewarshipmilitary vehiclevehicleconveyanceinstrumentalityartifactwholeobjectphysical entityentity
Inherited Hypernyms:attack submarinesubmarinesubmersiblewarshipshipvesselcraftvehicleconveyanceinstrumentalityartifactwholeobjectphysical entityentity