Dibranchia vs subclass Dibranchia

Dibranchia and subclass Dibranchia both are nouns.

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

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

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

Other synonyms of Dibranchia include Dibranchiata, subclass Dibranchiata.

Dibranchia (noun)	subclass Dibranchia (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)