Synonyms for Torpedo (same or very similar meaning)
WordNet sense 1 (a professional killer who uses a gun):
gun, gunman, gunslinger, shooter, hitman, triggerman, gun for hire, hired gun
WordNet sense 2 (a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States):
bomber, grinder, hero, hoagie, hoagy, sub, submarine, wedge, zep, Cuban sandwich, hero sandwich, Italian sandwich, submarine sandwich
WordNet sense 3 (any sluggish bottom-dwelling ray of the order Torpediniformes having a rounded body and electric organs on each side of the head capable of emitting strong electric discharges):
crampfish, numbfish, electric ray
From the ODE community, based on WordNet
add/edit