/ Thesaurus / S Synonyms of surreptitiously Find synonyms for: Adverb1. surreptitiously, sneakilyusage: in a surreptitious manner; "he was watching her surreptitiously as she waited in the hotel lobby"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language