musculus biceps femoris vs femoral biceps

musculus biceps femoris and femoral biceps both are nouns.

Word	Noun	Adjective	Verb	Adverb
musculus biceps femoris	Yes	No	No	No
femoral biceps	Yes	No	No	No

As nouns, musculus biceps femoris and femoral biceps are synonyms defined as:

musculus biceps femoris and femoral biceps: the biceps muscle of the thigh; it flexes the knee and rotates the leg laterally

musculus biceps femoris (noun)	femoral biceps (noun)
the biceps muscle of the thigh; it flexes the knee and rotates the leg laterally	the biceps muscle of the thigh; it flexes the knee and rotates the leg laterally