ineptitude vs vanity

ineptitude and vanity both are nouns.

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

As nouns, vanity is a hyponym of ineptitude; that is, vanity is a word with a more specific, narrower meaning than ineptitude:

ineptitude (noun)	vanity (noun)
having no qualities that would render it valuable or useful	low table with mirror or mirrors where one sits while dressing or applying makeup
unskillfulness resulting from a lack of training	the trait of being unduly vain and conceited; false pride
	the quality of being valueless or futile
	feelings of excessive pride