yes its an adjective
The adjective form of the noun muscle is "muscular" or "muscled" (or the rarer form muscly).
The muscular man looked like he was on steroids. Muscular is an adjective
The noun form of the adjective 'athletic' is athleticism.The word 'athletic' is the adjective form of the noun athlete.
No, it is a noun (physique) or verb (to move with strength, or slang to force).The adjectives include muscular, muscled, or the very rare form muscly.
The adjective form of concept is conceptual.The adjective form of conception is conceptional.
The adjective form is cranial.
The adjective form for the pronoun they is their.
muscles as in body muscles? or mussels as in sea mussels like mollusks?
The Adjective form of Pathologist is Pathological.
The adjective form of concept is conceptual.The adjective form of conception is conceptional.
The adjective form of improve is "improved."
The adjective form for the verb to develop is developable.