/ Thesaurus / F Synonyms of fantastically Find synonyms for: Adverb1. fabulously, fantastically, incrediblyusage: exceedingly; extremely; "she plays fabulously well"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language