lighthearted vs light-hearted

lighthearted and light-hearted both are adjectives.

Word	Noun	Adjective	Verb	Adverb
lighthearted	No	Yes	No	No
light-hearted	No	Yes	No	No

As adjectives, lighthearted and light-hearted are synonyms defined as:

Other synonyms of lighthearted include blithe, blithesome, lightsome.

lighthearted (adjective)	light-hearted (adjective)
carefree and happy and lighthearted	carefree and happy and lighthearted