mesomorph vs mesomorphic

mesomorph is a noun but mesomorphic is not a noun.

Word	Noun	Adjective	Verb	Adverb
mesomorph	Yes	No	No	No
mesomorphic	No	Yes	No	No

mesomorph (noun)	mesomorphic (noun)
a person with a well-developed muscular body

mesomorph (adjective)	mesomorphic (adjective)
	having a robust muscular body-build characterized by predominance of structures (bone and muscle and connective tissue) developed from the embryonic mesodermal layer