unfit vs disabled

unfit is not a noun while disabled is a noun.

Word	Noun	Adjective	Verb	Adverb
unfit	No	Yes	Yes	No
disabled	Yes	Yes	No	No

unfit (noun)	disabled (noun)
	people collectively who are crippled or otherwise physically handicapped

unfit (adjective)	disabled (adjective)
not in good physical or mental condition; out of condition	the total or partial absence of a person's bodily or mental functions, including the absence of a part of a person's body
below the required standards for a purpose
physically unsound or diseased

unfit (verb)	disabled (verb)
make unfit or unsuitable