/ Thesaurus / C Synonyms of cardinal tetra Find synonyms for: Noun1. cardinal tetra, Paracheirodon axelrodi, characin, characin fish, characidusage: small bright red and blue aquarium fish from streams in Brazil and ColombiaWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: lyre Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language