insouciance vs carefreeness

insouciance and carefreeness both are nouns.

Word	Noun	Adjective	Verb	Adverb
insouciance	Yes	No	No	No
carefreeness	Yes	No	No	No

As nouns, insouciance and carefreeness are synonyms defined as:

insouciance and carefreeness: the cheerful feeling you have when nothing is troubling you

Other synonyms of insouciance include lightheartedness, lightsomeness.

insouciance (noun)	carefreeness (noun)
the cheerful feeling you have when nothing is troubling you	the trait of being without worry or responsibility
	the cheerful feeling you have when nothing is troubling you