/ Thesaurus / G Synonyms of geothermally Find synonyms for: Adverb1. geothermallyusage: by means of heat from the interior of the earthWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language