musclebuilder vs muscle-builder

musclebuilder and muscle-builder both are nouns.

Word	Noun	Adjective	Verb	Adverb
musclebuilder	Yes	No	No	No
muscle-builder	Yes	No	No	No

As nouns, musclebuilder and muscle-builder are synonyms defined as:

musclebuilder and muscle-builder: someone who does special exercises to develop a brawny musculature

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

musclebuilder (noun)	muscle-builder (noun)
someone who does special exercises to develop a brawny musculature	someone who does special exercises to develop a brawny musculature