The word "Torpedinous" means resembling a torpedo in shape, appearance or movement. Some synonyms for this word include torpedo-shaped, streamlined, bullet-shaped, cylindrical, oblong, fusiform and spindle-shaped. All of these words imply a long, thin and tapering form that is common in marine life as well as modern military weaponry. Torpedinous can also connote the stealthy, swift and devastating nature of torpedoes, and therefore synonyms such as dangerous, powerful, deadly, lethal, potent and formidable are also applicable. Whether you are talking about fish, ships or other objects, torpedinous remains a vivid and colorful word that can be aptly replaced with a range of equally descriptive synonyms.