Blackbeetle and Cockroach

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

Cockroach and blackbeetle are semantically related. In some cases you can use "Cockroach" instead a noun "Blackbeetle".

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

Blackbeetle and cockroach are semantically related. Sometimes you can replace term "Blackbeetle" with "Cockroach", this nouns are similar.