/ Thesaurus / I Synonyms of isoetaceae Find synonyms for: Noun1. Isoetaceae, family Isoetaceae, quillwort family, fern familyusage: quillworts; coextensive with the genus IsoetesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: reticent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language