inept vs cumbersome

inept and cumbersome both are adjectives.

Word	Noun	Adjective	Verb	Adverb
inept	No	Yes	No	No
cumbersome	No	Yes	No	No

As adjectives, inept and cumbersome are synonyms defined as:

Other synonyms of inept include awkward, clumsy, ill-chosen, inapt.

inept (adjective)	cumbersome (adjective)
generally incompetent and ineffectual	not elegant or graceful in expression
not elegant or graceful in expression	difficult to handle or use especially because of size or weight
revealing lack of perceptiveness or judgment or finesse