Blatta orientalis vs oriental roach

Blatta orientalis and oriental roach both are nouns.

Word	Noun	Adjective	Verb	Adverb
Blatta orientalis	Yes	No	No	No
oriental roach	Yes	No	No	No

As nouns, Blatta orientalis and oriental roach are synonyms defined as:

Blatta orientalis and oriental roach: dark brown cockroach originally from orient now nearly cosmopolitan in distribution

Other synonyms of Blatta orientalis include Asiatic cockroach, blackbeetle, oriental cockroach.

Blatta orientalis (noun)	oriental roach (noun)
dark brown cockroach originally from orient now nearly cosmopolitan in distribution	dark brown cockroach originally from orient now nearly cosmopolitan in distribution