/ Thesaurus / A Synonyms of activating agent Find synonyms for: Noun1. activating agent, activatorusage: (mineral extraction) a surface-active chemical used in flotation process to increase the attraction to a specific mineralWordNet 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