/ Thesaurus / H Synonyms of horsetail family Find synonyms for: Noun1. Equisetaceae, family Equisetaceae, horsetail family, fern familyusage: sole surviving family of the Equisetales: fern alliesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: grimace Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language