/ Thesaurus / K Synonyms of kingdom of tonga Find synonyms for: Noun1. Tonga, Kingdom of Tonga, Friendly Islandsusage: a monarchy on a Polynesian archipelago in the South Pacific; achieved independence from the United Kingdom in 1970WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language