/ Thesaurus / T Synonyms of thomas willis Find synonyms for: Noun1. Willis, Thomas Willisusage: English physician who was a pioneer in the study of the brain (1621-1675)WordNet 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