Breadcrumb Home > Thesaurus > O Synonyms of old world least weasel Find synonyms for: Noun1. Old World least weasel, Mustela nivalis, weaselusage: of EuropeWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. ✖ Related Content Daily Word Quiz: deracinate Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language