/ Thesaurus / O Synonyms of oil stain Find synonyms for: Noun1. oil stain, stain, discoloration, discolourationusage: a stain produced by oilWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language