/ Thesaurus / A Synonyms of amphibious operation Find synonyms for: Noun1. amphibious operation, operation, military operationusage: a military operation by both land and sea forcesWordNet 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