Heretic(n.) One who holds to a heresy; one who believes some doctrine contrary to the established faith or prevailing religion.
Heretic(n.) One who having made a profession of Christian belief, deliberately and pertinaciously refuses to believe one or more of the articles of faith \"determined by the authority of the universal church.\"
Heretical(a.) Containing heresy; of the nature of, or characterized by, heresy.
Heretically(adv.) In an heretical manner.
Hereticate(v. t.) To decide to be heresy or a heretic; to denounce as a heretic or heretical.

Words within hereticate