| Main Entry: | |
| Part of Speech: | noun |
| Definition: | sub |
| Synonyms: | U-boat, nuclear submarine, submersible, underwater craft, underwater robot |
| Main Entry: | deep |
| Part of Speech: | adjective |
| Definition: | extending very far, usually down |
| Synonyms: | abysmal, abyssal, below, beneath, bottomless, broad, buried, deep-seated, distant, downreaching, far, fathomless, immersed, inmost, low, profound, rooted, subaqueous, submarine, submerged, subterranean, sunk, underground, unfathomable, wide, yawning |
| Antonyms: | shallow |
| Main Entry: | hero |
| Part of Speech: | noun |
| Definition: | submarine sandwich |
| Synonyms: | grinder, hoagie, sub, submarine, torpedo |
| Main Entry: | underwater |
| Part of Speech: | adjective |
| Definition: | under the water's surface |
| Synonyms: | immersed, subaquatic, subaqueous, submarine, submerged, sunken, undersea |
| Main Entry: | hero sandwich |
| Part of Speech: | noun |
| Definition: | large sandwich |
| Synonyms: | blimpie, grinder, hero, hoagie, hoagy, poorboy, sub, submarine, submarine sandwich, wedge |
| Main Entry: | hoagie |
| Part of Speech: | noun |
| Definition: | long sandwich |
| Synonyms: | hero, sandwich, submarine |
| Main Entry: | warship |
| Part of Speech: | noun |
| Definition: | large boat |
| Synonyms: | battleship, corvette, cruiser, cutter, destroyer, dreadnaught, dreadnought, frigate, gunboat, submarine |