genu vs human knee

genu and human knee both are nouns.

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

As nouns, genu and human knee are synonyms defined as:

genu and human 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, knee, knee joint.

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