genu vs knee

genu and knee both are nouns.

Word	Noun	Adjective	Verb	Adverb
genu	Yes	No	No	No
knee	Yes	No	No	No

As nouns, genu and knee are synonyms defined as:

genu and knee: hinge joint in the human leg connecting the tibia and fibula with the femur and protected in front by the patella

Other synonyms of genu include articulatio genus, human knee, knee joint.

genu (noun)	knee (noun)
hinge joint in the human leg connecting the tibia and fibula with the femur and protected in front by the patella	joint between the femur and tibia in a quadruped; corresponds to the human knee
	the part of a trouser leg that provides the cloth covering for the knee
	hinge joint in the human leg connecting the tibia and fibula with the femur and protected in front by the patella