unconcerned vs insouciant

unconcerned and insouciant both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unconcerned	No	Yes	No	No
insouciant	No	Yes	No	No

unconcerned (adjective)	insouciant (adjective)
lacking in interest or care or feeling	marked by blithe unconcern
not occupied or engaged with
easy in mind; not worried