long-legged vs leggy

long-legged and leggy both are adjectives.

Word	Noun	Adjective	Verb	Adverb
long-legged	No	Yes	No	No
leggy	No	Yes	No	No

As adjectives, long-legged and leggy are synonyms defined as:

Other synonyms of long-legged include long-shanked.

long-legged (adjective)	leggy (adjective)
having long legs	having long legs
	(of plants) having tall spindly stems