Learn That Word

Synonyms for Swordfish (same or very similar meaning)

WordNet sense 1 (large toothless marine food fish with a long swordlike upper jaw; not completely cold-blooded i.e. they are able to warm their brains and eyes: worldwide in warm waters but feed on cold ocean floor coming to surface at night):
Xiphias gladius

From the ODE community, based on WordNetadd/edit