suborder Myxiniformes vs Myxinoidei

suborder Myxiniformes and Myxinoidei both are nouns.

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

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

suborder Myxiniformes and Myxinoidei: hagfishes as distinguished from lampreys

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

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