/ Thesaurus / S Synonyms of sphere of influence Find synonyms for: Noun1. sphere, sphere of influence, geographical area, geographic area, geographical region, geographic regionusage: the geographical area in which one nation is very influentialWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: denizen Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language