black-winged stilt vs stilt

black-winged stilt and stilt both are nouns.

Word	Noun	Adjective	Verb	Adverb
black-winged stilt	Yes	No	No	No
stilt	Yes	No	No	No

As nouns, stilt is a hypernym of black-winged stilt; that is, stilt is a word with a broader meaning than black-winged stilt:

black-winged stilt: stilt of Europe and Africa and Asia having mostly white plumage but with black wings
stilt: long-legged three-toed black-and-white wading bird of inland ponds and marshes or brackish lagoons

Other hypernyms of black-winged stilt include Himantopus stilt, long-legs, longlegs, stilt plover, stiltbird.

black-winged stilt (noun)	stilt (noun)
stilt of Europe and Africa and Asia having mostly white plumage but with black wings	long-legged three-toed black-and-white wading bird of inland ponds and marshes or brackish lagoons
	long-legged three-toed wading bird of brackish marshes of Australia
	one of two stout poles with foot rests in the middle; used for walking high above the ground
	a column of wood or steel or concrete that is driven into the ground to provide support for a structure