desensitize vs deaf

desensitize is not a noun while deaf is a noun.

Word	Noun	Adjective	Verb	Adverb
desensitize	No	No	Yes	No
deaf	Yes	Yes	Yes	No

As verbs, deaf is a hyponym of desensitize; that is, deaf is a word with a more specific, narrower meaning than desensitize:

Other hyponyms of desensitize include benumb, blunt, dull, numb, bedaze, daze, stun, besot, stupefy, deafen.

desensitize (noun)	deaf (noun)
	people who have severe hearing impairments

desensitize (adjective)	deaf (adjective)
	lacking or deprived of the sense of hearing wholly or in part
	(usually followed by `to') unwilling or refusing to pay heed

desensitize (verb)	deaf (verb)
make insensitive	make or render deaf
cause not to be sensitive