wader vs shoebird

wader and shoebird both are nouns.

Word	Noun	Adjective	Verb	Adverb
wader	Yes	No	No	No
shoebird	Yes	No	No	No

As nouns, shoebird is a hyponym of wader; that is, shoebird is a word with a more specific, narrower meaning than wader:

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

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