shore bird vs wader

shore bird and wader both are nouns.

Word	Noun	Adjective	Verb	Adverb
shore bird	Yes	No	No	No
wader	Yes	No	No	No

As nouns, wader is a hypernym of shore bird; that is, wader is a word with a broader meaning than shore bird:

shore bird: any of numerous wading birds that frequent mostly seashores and estuaries
wader: any of many long-legged birds that wade in water in search of food

Other hypernyms of shore bird include wading bird.

shore bird (noun)	wader (noun)
any of numerous wading birds that frequent mostly seashores and estuaries	any of many long-legged birds that wade in water in search of food