surfbird vs shorebird

surfbird and shorebird both are nouns.

Word	Noun	Adjective	Verb	Adverb
surfbird	Yes	No	No	No
shorebird	Yes	No	No	No

As nouns, shorebird is a hypernym of surfbird; that is, shorebird is a word with a broader meaning than surfbird:

surfbird: sandpiper-like shorebird of Pacific coasts of North America and South America
shorebird: any of numerous wading birds that frequent mostly seashores and estuaries

Other hypernyms of surfbird include limicoline bird, shore bird.

surfbird (noun)	shorebird (noun)
sandpiper-like shorebird of Pacific coasts of North America and South America	any of numerous wading birds that frequent mostly seashores and estuaries