bastardise vs debase

bastardise and debase both are verbs.

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

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

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

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

bastardise (verb)	debase (verb)
declare a child to be illegitimate	lower in value by increasing the base-metal content
change something so that its value declines; for example, art forms	corrupt, debase, or make impure by adding a foreign or inferior substance; often by replacing valuable ingredients with inferior ones
	corrupt morally or by intemperance or sensuality