Ceryle alcyon vs kingfisher

Ceryle alcyon and kingfisher both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ceryle alcyon	Yes	No	No	No
kingfisher	Yes	No	No	No

As nouns, kingfisher is a hypernym of Ceryle alcyon; that is, kingfisher is a word with a broader meaning than Ceryle alcyon:

Ceryle alcyon: greyish-blue North American kingfisher with a chestnut band on its chest
kingfisher: nonpasserine large-headed bird with a short tail and long sharp bill; usually crested and bright-colored; feed mostly on fish

Ceryle alcyon (noun)	kingfisher (noun)
greyish-blue North American kingfisher with a chestnut band on its chest	nonpasserine large-headed bird with a short tail and long sharp bill; usually crested and bright-colored; feed mostly on fish