/ Thesaurus / O Synonyms of order isoetales Find synonyms for: Noun1. Isoetales, order Isoetales, plant orderusage: aquatic or marsh-growing fern allies; known to have existed since the Cenozoic; sometimes included in LycopodialesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: pristine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language