Blatta orientalis and Cockroach

Blatta orientalis noun - Dark brown cockroach originally from orient now nearly cosmopolitan in distribution.

Cockroach and Blatta orientalis are semantically related. In some cases you can use "Cockroach" instead a noun phrase "Blatta orientalis".

Cockroach noun - Any of numerous chiefly nocturnal insects; some are domestic pests.

Blatta orientalis and cockroach are semantically related. Sometimes you can replace phrase "Blatta orientalis" with "Cockroach", this terms are similar.