/ Thesaurus / S Synonyms of suction cup Find synonyms for: Noun1. suction cup, deviceusage: a cup-shaped device (made of rubber, glass, or plastic) that produces a partial vacuum; used to adhere or draw something to a surfaceWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: acerbity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language