/ Thesaurus / P Synonyms of plus fours Find synonyms for: Noun1. plus fours, breeches, knee breeches, knee pants, knickerbockers, knickersusage: men's baggy knickers hanging below the knees; formerly worn for sports (especially golf)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: philanthropy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language