Petromyzoniformes vs suborder Petromyzoniformes

Petromyzoniformes and suborder Petromyzoniformes both are nouns.

Word	Noun	Adjective	Verb	Adverb
Petromyzoniformes	Yes	No	No	No
suborder Petromyzoniformes	Yes	No	No	No

As nouns, Petromyzoniformes and suborder Petromyzoniformes are synonyms defined as:

Petromyzoniformes and suborder Petromyzoniformes: lampreys as distinguished from hagfishes

Other synonyms of Petromyzoniformes include Hyperoartia, suborder Hyperoartia.

Petromyzoniformes (noun)	suborder Petromyzoniformes (noun)
lampreys as distinguished from hagfishes	lampreys as distinguished from hagfishes