oriental roach vs cockroach

oriental roach and cockroach both are nouns.

Word	Noun	Adjective	Verb	Adverb
oriental roach	Yes	No	No	No
cockroach	Yes	No	No	No

As nouns, cockroach is a hypernym of oriental roach; that is, cockroach is a word with a broader meaning than oriental roach:

oriental roach: dark brown cockroach originally from orient now nearly cosmopolitan in distribution
cockroach: any of numerous chiefly nocturnal insects; some are domestic pests

Other hypernyms of oriental roach include roach.

oriental roach (noun)	cockroach (noun)
dark brown cockroach originally from orient now nearly cosmopolitan in distribution	any of numerous chiefly nocturnal insects; some are domestic pests