/ Thesaurus / O Synonyms of octadecanoic acid Find synonyms for: Noun1. stearic acid, octadecanoic acid, saturated fatty acidusage: a waxy saturated fatty acid; occurs widely as a glyceride in animal and vegetable fatsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: devout Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language