gastrocnemius vs gastrocnemius muscle

gastrocnemius and gastrocnemius muscle both are nouns.

Word	Noun	Adjective	Verb	Adverb
gastrocnemius	Yes	No	No	No
gastrocnemius muscle	Yes	No	No	No

As nouns, gastrocnemius and gastrocnemius muscle are synonyms defined as:

gastrocnemius and gastrocnemius muscle: the muscle in the back part of the leg that forms the greater part of the calf; responsible for the plantar flexion of the foot

gastrocnemius (noun)	gastrocnemius muscle (noun)
the muscle in the back part of the leg that forms the greater part of the calf; responsible for the plantar flexion of the foot	the muscle in the back part of the leg that forms the greater part of the calf; responsible for the plantar flexion of the foot