femoris vs femur

femoris and femur both are nouns.

Word	Noun	Adjective	Verb	Adverb
femoris	Yes	No	No	No
femur	Yes	No	No	No

As nouns, femoris and femur are synonyms defined as:

femoris and femur: the longest and thickest bone of the human skeleton; extends from the pelvis to the knee

Other synonyms of femoris include thighbone.

femoris (noun)	femur (noun)
the longest and thickest bone of the human skeleton; extends from the pelvis to the knee	the longest and thickest bone of the human skeleton; extends from the pelvis to the knee