unconcerned vs casual

unconcerned and casual both are adjectives.

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

unconcerned (adjective)	casual (adjective)
lacking in interest or care or feeling	hasty and without attention to detail; not thorough
not occupied or engaged with	not showing effort or strain
easy in mind; not worried	occurring on a temporary or irregular basis
	marked by blithe unconcern
	appropriate for ordinary or routine occasions
	occurring or appearing or singled out by chance
	natural and unstudied
	characterized by a feeling of irresponsibility
	without or seeming to be without plan or method; offhand