Breadcrumb Home > Thesaurus Cite Synonyms of siam Find synonyms for: Noun1. Thailand, Kingdom of Thailand, Siamusage: a country of southeastern Asia that extends southward along the Isthmus of Kra to the Malay Peninsula; "Thailand is the official name of the former Siam"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.See also: siam (Dictionary) Related Content Daily Word Quiz: apotheosis Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language Synonyms Index