Myxiniformes vs suborder Myxinoidei

Myxiniformes and suborder Myxinoidei both are nouns.

Word	Noun	Adjective	Verb	Adverb
Myxiniformes	Yes	No	No	No
suborder Myxinoidei	Yes	No	No	No

As nouns, Myxiniformes and suborder Myxinoidei are synonyms defined as:

Myxiniformes and suborder Myxinoidei: hagfishes as distinguished from lampreys

Other synonyms of Myxiniformes include Hyperotreta, Myxinoidea, Myxinoidei, suborder Hyperotreta, suborder Myxiniformes.

Myxiniformes (noun)	suborder Myxinoidei (noun)
hagfishes as distinguished from lampreys	hagfishes as distinguished from lampreys