/ Thesaurus / F Synonyms of frog's lettuce Find synonyms for: Noun1. frog's lettuce, pondweedusage: very similar to Potamogeton; of western Africa, Asia, and EuropeWordNet 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