benumb vs blunt

benumb is not an adjective while blunt is an adjective.

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

As verbs, benumb and blunt are synonyms defined as:

Other synonyms of benumb include dull, numb.

benumb (adjective)	blunt (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

benumb (verb)	blunt (verb)
make numb or insensitive	make less sharp
	make less intense
	make less lively, intense, or vigorous; impair in vigor, force, activity, or sensation
	make dull or blunt
	make numb or insensitive