unconcerned vs nonchalant

unconcerned and nonchalant both are adjectives.

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

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