bastardise vs profane

bastardise is not an adjective while profane is an adjective.

Word	Noun	Adjective	Verb	Adverb
bastardise	No	No	Yes	No
profane	No	Yes	Yes	No

As verbs, profane is a hypernym of bastardise; that is, profane is a word with a broader meaning than bastardise:

bastardise: change something so that its value declines; for example, art forms
profane: corrupt morally or by intemperance or sensuality

Other hypernyms of bastardise include corrupt, debase, debauch, demoralise, demoralize, deprave, misdirect, pervert, subvert, vitiate.

bastardise (adjective)	profane (adjective)
	not concerned with or devoted to religion
	characterized by profanity or cursing
	grossly irreverent toward what is held to be sacred
	not holy because unconsecrated or impure or defiled

bastardise (verb)	profane (verb)
declare a child to be illegitimate	violate the sacred character of a place or language
change something so that its value declines; for example, art forms	corrupt morally or by intemperance or sensuality