/ Thesaurus / S Synonyms of sash window Find synonyms for: Noun1. sash window, windowusage: a window with (usually two) sashes that slide vertically to let in airWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: denizen Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language