/ Thesaurus / F Synonyms of fastidiousness Find synonyms for: Noun1. fastidiousness, cleanlinessusage: the trait of being meticulous about matters of taste or style; "neatness and fastidiousness of dress"WordNet 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