The word 'green' is a noun (the name of a color); an adjective (green, greener, greenest), a word that describes a noun; and a verb (green, greens, greening, greened). Noun: … Green is a good color for that room. She made a salad of greens with vinaigrette.t can be. The word functions as a noun, an adjective and a verb, all depending on context. Noun: The village green is a place shared by villagers which is usually covered in grass. Adjective: He was wearing a green shirt.