/ Thesaurus / F Synonyms of fad diet Find synonyms for: Noun1. fad diet, reducing diet, obesity dietusage: a reducing diet that enjoys temporary popularityWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language