Synonyms of heretical
1 controversialDictionary • I made a heretical suggestion.
unorthodox • his expression of unorthodox religious beliefs
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heterodoxHeterodox beliefs, opinions, or ideas are different from the accepted or official ones.
• They were generally treating heterodox ideas as un-American.
iconoclasticIf you describe someone or their words or ideas as iconoclastic, you mean that they contradict established beliefs.
• His iconoclastic tendencies can get him into trouble.
schismaticof, relating to, or promoting schism
Thesaurus for heretical from the Collins English Thesaurus
A belief or action that is heretical is one that most people think is wrong because it disagrees with beliefs that are generally accepted.