/ Thesaurus / B Synonyms of buckwheat family Find synonyms for: Noun1. Polygonaceae, family Polygonaceae, buckwheat family, dicot family, magnoliopsid familyusage: a family of plants of order Polygonales chiefly of the north temperate zone; includes the buckwheatsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: dispel Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language