crested swift vs apodiform bird

crested swift and apodiform bird both are nouns.

Word	Noun	Adjective	Verb	Adverb
crested swift	Yes	No	No	No
apodiform bird	Yes	No	No	No

As nouns, apodiform bird is a hypernym of crested swift; that is, apodiform bird is a word with a broader meaning than crested swift:

crested swift: birds of southeast Asia and East Indies differing from true swifts in having upright crests and nesting in trees
apodiform bird: nonpasserine bird having long wings and weak feet; spends much of its time in flight

crested swift (noun)	apodiform bird (noun)
birds of southeast Asia and East Indies differing from true swifts in having upright crests and nesting in trees	nonpasserine bird having long wings and weak feet; spends much of its time in flight