Word Study
biretta
OXFORD DICTIONARY
biretta, n. a square usu. black cap with three flat projections on top, worn by (esp. Roman Catholic) clergymen.
Etymology
It. berretta or Sp. birreta f. LL birrus cape
ROGET THESAURUS
biretta
Canonicals
N canonicals, vestments, robe, gown, Geneva gown frock, pallium, surplice, cassock, dalmatic, scapulary, cope, mozetta, scarf, tunicle, chasuble, alb, alba, stole, fanon, fannel, tonsure, cowl, hood, calote, calotte, bands, capouch, amice, vagas, vakas, vakass, apron, lawn sleeves, pontificals, pall, miter, tiara, triple crown, shovel hat, cardinal's hat, biretta, crosier, pastoral staff, thurifer, costume.For further exploring for "biretta" in Webster Dictionary Online