Dibranchiata vs subclass Dibranchiata

Dibranchiata and subclass Dibranchiata both are nouns.

Word	Noun	Adjective	Verb	Adverb
Dibranchiata	Yes	No	No	No
subclass Dibranchiata	Yes	No	No	No

As nouns, Dibranchiata and subclass Dibranchiata are synonyms defined as:

Dibranchiata and subclass Dibranchiata: comprising all living cephalopods except the family Nautilidae: the orders Octopoda (octopuses) and Decapoda (squids and cuttlefish)

Other synonyms of Dibranchiata include Dibranchia, subclass Dibranchia.

Dibranchiata (noun)	subclass Dibranchiata (noun)
comprising all living cephalopods except the family Nautilidae: the orders Octopoda (octopuses) and Decapoda (squids and cuttlefish)	comprising all living cephalopods except the family Nautilidae: the orders Octopoda (octopuses) and Decapoda (squids and cuttlefish)