From Longman Dictionary of Contemporary Englishheadpiecehead‧piece /ˈhedpiːs/ noun [countable] PROTECTsomething you wear on your head, usually for decoration
Examples from the Corpus
headpiece• So what if you can spot his acne through the ill-fitting headpiece?• He dons a fake goatee, headpiece, and voila, he is Don Q.. Why not? 