suborder Myxinoidei vs Myxiniformes

suborder Myxinoidei and Myxiniformes both are nouns.

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

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

suborder Myxinoidei and Myxiniformes: hagfishes as distinguished from lampreys

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

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