clumsiness vs ineptitude

clumsiness and ineptitude both are nouns.

Word	Noun	Adjective	Verb	Adverb
clumsiness	Yes	No	No	No
ineptitude	Yes	No	No	No

As nouns, clumsiness and ineptitude are synonyms defined as:

clumsiness and ineptitude: unskillfulness resulting from a lack of training

Other synonyms of clumsiness include awkwardness, ineptness, maladroitness, slowness.

clumsiness (noun)	ineptitude (noun)
the carriage of someone whose movements and posture are ungainly or inelegant	having no qualities that would render it valuable or useful
the inelegance of someone stiff and unrelaxed (as by embarrassment)	unskillfulness resulting from a lack of training
unskillfulness resulting from a lack of training