her·e·sy 
/ˈherəsi/ noun
plural her·e·sies /ˈherəsi/ noun : a belief or opinion that does not agree with the official belief or opinion of a particular religion [noncount] ▪ They were accused of heresy. [count] ▪ He was preaching dangerous heresies. — often used figuratively ▪ To disagree with the party leadership was heresy.
