Hyperotreta vs suborder Myxinoidei

Hyperotreta and suborder Myxinoidei both are nouns.

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

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

Hyperotreta and suborder Myxinoidei: hagfishes as distinguished from lampreys

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

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