/ Thesaurus / C Synonyms of celtic language Find synonyms for: Noun1. Celtic, Celtic language, Indo-European, Indo-European language, Indo-Hittiteusage: a branch of the Indo-European languages that (judging from inscriptions and place names) was spread widely over Europe in the pre-Christian eraWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: candid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language