muscleman vs musclebuilder

muscleman and musclebuilder both are nouns.

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

As nouns, muscleman and musclebuilder are synonyms defined as:

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

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

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