/ Thesaurus / F Synonyms of fish oil Find synonyms for: Noun1. fish-liver oil, fish oil, animal oilusage: a fatty oil obtained from the livers of various fishWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: grimace Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language