hummingbird vs apodiform bird

hummingbird and apodiform bird both are nouns.

Word	Noun	Adjective	Verb	Adverb
hummingbird	Yes	No	No	No
apodiform bird	Yes	No	No	No

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

hummingbird: tiny American bird having brilliant iridescent plumage and long slender bills; wings are specialized for vibrating flight
apodiform bird: nonpasserine bird having long wings and weak feet; spends much of its time in flight

hummingbird (noun)	apodiform bird (noun)
tiny American bird having brilliant iridescent plumage and long slender bills; wings are specialized for vibrating flight	nonpasserine bird having long wings and weak feet; spends much of its time in flight