blunt vs desensitize

blunt is an adjective but desensitize is not an adjective.

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

As verbs, desensitize is a hypernym of blunt; that is, desensitize is a word with a broader meaning than blunt:

Other hypernyms of blunt include desensitise.

blunt (adjective)	desensitize (adjective)
characterized by directness in manner or speech; without subtlety or evasion
used of a knife or other blade; not sharp
having a broad or rounded end
devoid of any qualifications or disguise or adornment

blunt (verb)	desensitize (verb)
make less sharp	make insensitive
make less intense	cause not to be sensitive
make less lively, intense, or vigorous; impair in vigor, force, activity, or sensation
make dull or blunt
make numb or insensitive