| Arborous | a. Formed by trees. [ Obs. ] [ 1913 Webster ] From under shady, arborous roof. Milton. [ 1913 Webster ] |
| Harborous | a. Hospitable. [ Obs. ] [ 1913 Webster ] |
| arborical | (adj) of or relating to or formed by trees, Syn. arboreal, arborous, arborary, Example: an arborous roof |