shoebird vs wading bird

shoebird and wading bird both are nouns.

Word	Noun	Adjective	Verb	Adverb
shoebird	Yes	No	No	No
wading bird	Yes	No	No	No

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

shoebird: large stork-like bird of the valley of the White Nile with a broad bill suggesting a wooden shoe
wading bird: any of many long-legged birds that wade in water in search of food

Other hypernyms of shoebird include wader.

shoebird (noun)	wading bird (noun)
large stork-like bird of the valley of the White Nile with a broad bill suggesting a wooden shoe	any of many long-legged birds that wade in water in search of food