heterodox vs dissident

heterodox is not a noun while dissident is a noun.

Word	Noun	Adjective	Verb	Adverb
heterodox	No	Yes	No	No
dissident	Yes	Yes	No	No

As adjectives, heterodox and dissident are synonyms defined as:

heterodox and dissident: characterized by departure from accepted beliefs or standards

Other synonyms of heterodox include heretical.

heterodox (noun)	dissident (noun)
	a person who dissents from some established policy

heterodox (adjective)	dissident (adjective)
characterized by departure from accepted beliefs or standards	disagreeing, especially with a majority
	characterized by departure from accepted beliefs or standards