lame vs unfit

lame is a noun but unfit is not a noun.

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

lame (noun)	unfit (noun)
a fabric interwoven with threads of metal
someone who doesn't understand what is going on

lame (adjective)	unfit (adjective)
pathetically lacking in force or effectiveness	not in good physical or mental condition; out of condition
disabled in the feet or legs	below the required standards for a purpose
	physically unsound or diseased

lame (verb)	unfit (verb)
deprive of the use of a limb, especially a leg	make unfit or unsuitable