jawless fish vs jawless vertebrate

jawless fish and jawless vertebrate both are nouns.

Word	Noun	Adjective	Verb	Adverb
jawless fish	Yes	No	No	No
jawless vertebrate	Yes	No	No	No

As nouns, jawless fish and jawless vertebrate are synonyms defined as:

jawless fish and jawless vertebrate: eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms

Other synonyms of jawless fish include agnathan.

jawless fish (noun)	jawless vertebrate (noun)
eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms	eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms