unskilled vs incompetent

unskilled is not a noun while incompetent is a noun.

Word	Noun	Adjective	Verb	Adverb
unskilled	No	Yes	No	No
incompetent	Yes	Yes	No	No

As adjectives, unskilled and incompetent are synonyms defined as:

unskilled (noun)	incompetent (noun)
	someone who is not competent to take effective action

unskilled (adjective)	incompetent (adjective)
not having or showing or requiring special skill or proficiency	not qualified or suited for a purpose
not doing a good job	legally not qualified or sufficient
lacking professional skill or expertise	not doing a good job
	not meeting requirements
	showing lack of skill or aptitude