curlew vs shore bird

curlew and shore bird both are nouns.

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

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

curlew: large migratory shorebirds of the sandpiper family; closely related to woodcocks but having a down-curved bill
shore bird: any of numerous wading birds that frequent mostly seashores and estuaries

Other hypernyms of curlew include limicoline bird, shorebird.

curlew (noun)	shore bird (noun)
large migratory shorebirds of the sandpiper family; closely related to woodcocks but having a down-curved bill	any of numerous wading birds that frequent mostly seashores and estuaries