suborder Hyperotreta vs suborder Myxinoidei

suborder Hyperotreta and suborder Myxinoidei both are nouns.

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

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

suborder Hyperotreta and suborder Myxinoidei: hagfishes as distinguished from lampreys

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

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