/ Thesaurus / E Synonyms of end organ Find synonyms for: Noun1. end organ, organusage: a specialized structure at the peripheral end of some motor or sensory nerve fibersWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: labyrinth Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language