halfhearted vs half-hearted

halfhearted and half-hearted both are adjectives.

Word	Noun	Adjective	Verb	Adverb
halfhearted	No	Yes	No	No
half-hearted	No	Yes	No	No

As adjectives, halfhearted and half-hearted are synonyms defined as:

halfhearted and half-hearted: feeling or showing little interest or enthusiasm

Other synonyms of halfhearted include lukewarm, tepid.

halfhearted (adjective)	half-hearted (adjective)
feeling or showing little interest or enthusiasm	feeling or showing little interest or enthusiasm