unthoughtfulness vs trait

unthoughtfulness and trait both are nouns.

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

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

unthoughtfulness (noun)	trait (noun)
the trait of not thinking carefully before acting	a distinguishing feature of your personal nature