/ Thesaurus / C Synonyms of cyprinodontidae Find synonyms for: Noun1. Cyprinodontidae, family Cyprinodontidae, fish familyusage: large family of small soft-finned fishes; killifishes; flagfishes; swordtails; guppiesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language