half-hearted vs tepid

half-hearted and tepid both are adjectives.

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

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

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

Other synonyms of half-hearted include halfhearted, lukewarm.

half-hearted (adjective)	tepid (adjective)
feeling or showing little interest or enthusiasm	feeling or showing little interest or enthusiasm
	moderately warm