bodybuilder vs muscleman

bodybuilder and muscleman both are nouns.

Word	Noun	Adjective	Verb	Adverb
bodybuilder	Yes	No	No	No
muscleman	Yes	No	No	No

As nouns, bodybuilder and muscleman are synonyms defined as:

bodybuilder and muscleman: someone who does special exercises to develop a brawny musculature

Other synonyms of bodybuilder include muscle-builder, muscle builder, musclebuilder.

bodybuilder (noun)	muscleman (noun)
someone who does special exercises to develop a brawny musculature	a bully employed as a thug or bodyguard
	someone who does special exercises to develop a brawny musculature