deadening vs debasement

deadening and debasement both are nouns.

Word	Noun	Adjective	Verb	Adverb
deadening	Yes	Yes	No	No
debasement	Yes	No	No	No

As nouns, debasement is a hypernym of deadening; that is, debasement is a word with a broader meaning than deadening:

Other hypernyms of deadening include degradation.

deadening (noun)	debasement (noun)
the act of making something futile and useless (as by routine)	changing to a lower state (a less respected state)
	being mixed with extraneous material; the product of adulterating

deadening (adjective)	debasement (adjective)
so lacking in interest as to cause mental weariness