blithe vs unconcerned

blithe and unconcerned both are adjectives.

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

blithe (adjective)	unconcerned (adjective)
carefree and happy and lighthearted	lacking in interest or care or feeling
lacking or showing a lack of due concern	not occupied or engaged with
	easy in mind; not worried