avocet vs shore bird

avocet and shore bird both are nouns.

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

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

avocet: long-legged web-footed black-and-white shorebird with slender upward-curving bill
shore bird: any of numerous wading birds that frequent mostly seashores and estuaries

Other hypernyms of avocet include limicoline bird, shorebird.

avocet (noun)	shore bird (noun)
long-legged web-footed black-and-white shorebird with slender upward-curving bill	any of numerous wading birds that frequent mostly seashores and estuaries