Blattella germanica vs German cockroach

Blattella germanica and German cockroach both are nouns.

Word	Noun	Adjective	Verb	Adverb
Blattella germanica	Yes	No	No	No
German cockroach	Yes	No	No	No

As nouns, Blattella germanica and German cockroach are synonyms defined as:

Blattella germanica and German cockroach: small light-brown cockroach brought to United States from Europe; a common household pest

Other synonyms of Blattella germanica include Croton bug, crotonbug, water bug.

Blattella germanica (noun)	German cockroach (noun)
small light-brown cockroach brought to United States from Europe; a common household pest	small light-brown cockroach brought to United States from Europe; a common household pest