levelheaded vs level-headed

levelheaded and level-headed both are adjectives.

Word	Noun	Adjective	Verb	Adverb
levelheaded	No	Yes	No	No
level-headed	No	Yes	No	No

As adjectives, levelheaded and level-headed are synonyms defined as:

Other synonyms of levelheaded include healthy, intelligent, sound.

levelheaded (adjective)	level-headed (adjective)
exercising or showing good judgment	exercising or showing good judgment