pistol - bullet, submarine - ?

TORPEDO
List of words for the clue pistol - bullet, submarine - ? from the crossword:
BOW ARROW AMMO SLUG TOY HEATER PITCH SHOT AIM DELIVERY UZI ITEM SONAR ACE GAT TRACER LUGER SEGER HANDGUN
WordClue
BOWbullet - pistol, arrow - ?
ARROWpistol - bullet, bow - ?
BULLETsubmarine - torpedo, pistol - ?
PELLETbullet, gunstone
PISTOLtorpedo - submarine, bullet - ?
WEAPONbow or pistol
WARSHIPcorvette or submarine
SUBMARINEbullet - pistol, torpedo - ?
ARROWpistol - bullet, bow - ?
DETROIT... Pistons, NBA team