bandy-legged vs bowleg

bandy-legged is not a noun while bowleg is a noun.

Word	Noun	Adjective	Verb	Adverb
bandy-legged	No	Yes	No	No
bowleg	Yes	Yes	No	No

As adjectives, bandy-legged and bowleg are synonyms defined as:

Other synonyms of bandy-legged include bandy, bowed, bowlegged.

bandy-legged (noun)	bowleg (noun)
	a leg bowed outward at the knee (or below the knee)

bandy-legged (adjective)	bowleg (adjective)
have legs that curve outward at the knees	have legs that curve outward at the knees