Grass noun – Narrow-leaved green herbage: grown as lawns; used as pasture for grazing animals; cut and dried as hay. Agent and grass are semantically related. Sometimes you can use "Agent" instead a noun "Grass". Nearby Words: grassland, grassy, grassed, grassing
World of Weirdness: To name but one small example, at the beginning of Lost in a Good Book, a "Pampas Grass Vigilante Squad", which an SO-32 agent is charged to stop ("Pampas grass might well be an eyesore, but there's nothing illegal in it."), is mentioned, and this is by far a tame example.