/ Thesaurus / S Synonyms of spare part Find synonyms for: Noun1. spare part, spare, component, constituent, elementusage: an extra component of a machine or other apparatusWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: confectionery Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language