bodybuilder vs musclebuilder

bodybuilder and musclebuilder both are nouns.

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

As nouns, bodybuilder and musclebuilder are synonyms defined as:

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

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

bodybuilder (noun)	musclebuilder (noun)
someone who does special exercises to develop a brawny musculature	someone who does special exercises to develop a brawny musculature