IPA: /ˌhɛtəˈrɒdɒksi/
KK: /hɛtəˈrɒdɒksi/
A belief or opinion that differs from the accepted or traditional views, especially in religion or philosophy.
His views on the subject were considered heterodoxy by the mainstream scholars.
Heterodoxy → It is formed from "hetero-" (from Greek "heteros", meaning other or different) and "doxa" (from Greek, meaning opinion or belief). The word refers to beliefs or opinions that differ from established or orthodox views.
Think of 'other' ('hetero-') opinions or beliefs ('doxa') to remember that 'heterodoxy' means differing beliefs.
No commonly confused words.