oriental roach vs Blatta orientalis

oriental roach and Blatta orientalis both are nouns.

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

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

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

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

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