Rutilus rutilus vs roach

Rutilus rutilus and roach both are nouns.

Word	Noun	Adjective	Verb	Adverb
Rutilus rutilus	Yes	No	No	No
roach	Yes	No	Yes	No

As nouns, Rutilus rutilus and roach are synonyms defined as:

Rutilus rutilus and roach: European freshwater food fish having a greenish back

Rutilus rutilus (noun)	roach (noun)
European freshwater food fish having a greenish back	any of numerous chiefly nocturnal insects; some are domestic pests
	European freshwater food fish having a greenish back
	the butt of a marijuana cigarette
	street names for flunitrazepam
	a roll of hair brushed back from the forehead

Rutilus rutilus (verb)	roach (verb)
	cut the mane off (a horse)
	comb (hair) into a roach