Croton bug vs German cockroach

Croton bug and German cockroach both are nouns.

Word	Noun	Adjective	Verb	Adverb
Croton bug	Yes	No	No	No
German cockroach	Yes	No	No	No

As nouns, Croton bug and German cockroach are synonyms defined as:

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

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

Croton bug (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