Osteostraci vs suborder Cephalaspida

Osteostraci and suborder Cephalaspida both are nouns.

Word	Noun	Adjective	Verb	Adverb
Osteostraci	Yes	No	No	No
suborder Cephalaspida	Yes	No	No	No

As nouns, Osteostraci and suborder Cephalaspida are synonyms defined as:

Osteostraci and suborder Cephalaspida: extinct group of armored fish-like vertebrates; taxonomy is not clear

Other synonyms of Osteostraci include Cephalaspida, suborder Osteostraci.

Osteostraci (noun)	suborder Cephalaspida (noun)
extinct group of armored fish-like vertebrates; taxonomy is not clear	extinct group of armored fish-like vertebrates; taxonomy is not clear