button-quail vs wader

button-quail and wader both are nouns.

Word	Noun	Adjective	Verb	Adverb
button-quail	Yes	No	No	No
wader	Yes	No	No	No

As nouns, wader is a hypernym of button-quail; that is, wader is a word with a broader meaning than button-quail:

button-quail: small quail-like terrestrial bird of southern Eurasia and northern Africa that lacks a hind toe; classified with wading birds but inhabits grassy plains
wader: any of many long-legged birds that wade in water in search of food

Other hypernyms of button-quail include wading bird.

button-quail (noun)	wader (noun)
small quail-like terrestrial bird of southern Eurasia and northern Africa that lacks a hind toe; classified with wading birds but inhabits grassy plains	any of many long-legged birds that wade in water in search of food