cyclostome vs agnathan

cyclostome and agnathan both are nouns.

Word	Noun	Adjective	Verb	Adverb
cyclostome	Yes	No	No	No
agnathan	Yes	No	No	No

As nouns, agnathan is a hypernym of cyclostome; that is, agnathan is a word with a broader meaning than cyclostome:

cyclostome: primitive aquatic vertebrate
agnathan: eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms

Other hypernyms of cyclostome include jawless fish, jawless vertebrate.

cyclostome (noun)	agnathan (noun)
primitive aquatic vertebrate	eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms