genu varum vs bow leg

genu varum and bow leg both are nouns.

Word	Noun	Adjective	Verb	Adverb
genu varum	Yes	No	No	No
bow leg	Yes	No	No	No

As nouns, genu varum and bow leg are synonyms defined as:

genu varum and bow leg: a leg bowed outward at the knee (or below the knee)

Other synonyms of genu varum include bandy leg, bandyleg, bowleg, tibia vara.

genu varum (noun)	bow leg (noun)
a leg bowed outward at the knee (or below the knee)	a leg bowed outward at the knee (or below the knee)
	outward curvature of the legs