Synonyms of 'heretical'
I made a heretical suggestion.
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Heterodox beliefs, opinions, or ideas are different from the accepted or official ones.
They were generally treating heterodox ideas as un-American.
If 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.
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 .