/ Thesaurus / H Synonyms of human dynamo Find synonyms for: Noun1. powerhouse, human dynamo, ball of fire, fireball, actor, doer, workerusage: a highly energetic and indefatigable personWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language