bandy legs vs bow leg

bandy legs and bow leg both are nouns.

Word	Noun	Adjective	Verb	Adverb
bandy legs	Yes	No	No	No
bow leg	Yes	No	No	No

As nouns, bandy legs and bow leg are synonyms defined as:

Other synonyms of bandy legs include bow legs.

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