/ Thesaurus / I Synonyms of in for Find synonyms for: Adjective1. in for(predicate), certain (vs. uncertain), sureusage: certain to get or have; "he knew he was in for a licking"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: industrious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language