unsuitable vs inapplicable

unsuitable and inapplicable both are adjectives.

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

As adjectives, unsuitable and inapplicable are synonyms defined as:

unsuitable (adjective)	inapplicable (adjective)
not conducive to good moral development	not capable of being applied
not worthy of being chosen (especially as a spouse)
not meant or adapted for a particular purpose
not capable of being applied