sandpiper vs shore bird

sandpiper and shore bird both are nouns.

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

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

sandpiper: any of numerous usually small wading birds having a slender bill and piping call; closely related to the plovers
shore bird: any of numerous wading birds that frequent mostly seashores and estuaries

Other hypernyms of sandpiper include limicoline bird, shorebird.

sandpiper (noun)	shore bird (noun)
any of numerous usually small wading birds having a slender bill and piping call; closely related to the plovers	any of numerous wading birds that frequent mostly seashores and estuaries