vanity vs trait

vanity and trait both are nouns.

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

As nouns, trait is a hypernym of vanity; that is, trait is a word with a broader meaning than vanity:

vanity (noun)	trait (noun)
low table with mirror or mirrors where one sits while dressing or applying makeup	a distinguishing feature of your personal nature
the trait of being unduly vain and conceited; false pride
the quality of being valueless or futile
feelings of excessive pride