/ Thesaurus / T Synonyms of thinking cap Find synonyms for: Noun1. thinking cap, state of mind, frame of mindusage: a state in which one thinksWordNet 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