crotonbug vs water bug

crotonbug and water bug both are nouns.

Word	Noun	Adjective	Verb	Adverb
crotonbug	Yes	No	No	No
water bug	Yes	No	No	No

As nouns, crotonbug and water bug are synonyms defined as:

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

Other synonyms of crotonbug include Blattella germanica, Croton bug, German cockroach.

crotonbug (noun)	water bug (noun)
small light-brown cockroach brought to United States from Europe; a common household pest	a true bug: large aquatic bug adapted to living in or on the surface of water
	small light-brown cockroach brought to United States from Europe; a common household pest