Blatta orientalis vs oriental cockroach

Blatta orientalis and oriental cockroach both are nouns.

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

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

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

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

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