unsuitable vs unfit

unsuitable and unfit both are adjectives.

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

unsuitable (adjective)	unfit (adjective)
not conducive to good moral development	not in good physical or mental condition; out of condition
not worthy of being chosen (especially as a spouse)	below the required standards for a purpose
not meant or adapted for a particular purpose	physically unsound or diseased
not capable of being applied

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