long-legs vs Himantopus stilt

long-legs and Himantopus stilt both are nouns.

Word	Noun	Adjective	Verb	Adverb
long-legs	Yes	No	No	No
Himantopus stilt	Yes	No	No	No

As nouns, long-legs and Himantopus stilt are synonyms defined as:

long-legs and Himantopus stilt: long-legged three-toed black-and-white wading bird of inland ponds and marshes or brackish lagoons

Other synonyms of long-legs include longlegs, stilt, stilt plover, stiltbird.

long-legs (noun)	Himantopus stilt (noun)
long-legged three-toed black-and-white wading bird of inland ponds and marshes or brackish lagoons	long-legged three-toed black-and-white wading bird of inland ponds and marshes or brackish lagoons