/ Thesaurus / P Synonyms of peter out Find synonyms for: Verb1. taper off, peter out, fizzle out, fizzle, discontinueusage: end weakly; "The music just petered out--there was no proper ending"2. poop out, peter out, run down, run out, conk out, tire, pall, weary, fatigue, jadeusage: use up all one's strength and energy and stop working; "At the end of the march, I pooped out"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: reticent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language