Nouns

(n)roacha roll of hair brushed back from the forehead
(n)roachthe butt of a marijuana cigarette
(n)R-2, Mexican valium, rophy, rope, roofy, roach, forget me drug, circlestreet names for flunitrazepam
(n)cockroach, roachany of numerous chiefly nocturnal insects; some are domestic pests
(n)roach, Rutilus rutilusEuropean freshwater food fish having a greenish back

Verbs

(v)roachcomb (hair) into a roach
(v)roachcut the mane off (a horse)