clumsy vs incompetent

clumsy is not a noun while incompetent is a noun.

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

As adjectives, clumsy and incompetent are synonyms defined as:

Other synonyms of clumsy include bungling, fumbling.

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

clumsy (adjective)	incompetent (adjective)
lacking grace in movement or posture	not qualified or suited for a purpose
not elegant or graceful in expression	legally not qualified or sufficient
showing lack of skill or aptitude	not doing a good job
difficult to handle or manage especially because of shape	not meeting requirements
	showing lack of skill or aptitude