Home › Words › C › celtismceltismceltism means the customs and practices of the Celts.EtymologyFrom Celt + -ism.nounThe customs and practices of the Celts.Definitions & examples from Wiktionary (CC BY-SA 3.0).Words closest in meaningBy meaning, not spelling — each word's AI semantic fingerprint, nearest first.celticism 86% match — A Celtic custom or idiom. vs celtism →celtology 73% match — Celtic studies vs celtism →celticity 73% match — The quality of being Celtic. vs celtism →celtic 72% match — Of or relating to the Celts. vs celtism →celtish 72% match — Celtic vs celtism →celticness 72% match — The quality or state of being Celtic. vs celtism →celtization 71% match — Synonym of Celticization. vs celtism →celtist 70% match — A person who takes an interest in the Celts or the Celtic languages. vs celtism →