| Neighbor of Marge and Homer | 27 |
| Neighbor of Mars | 16 |
| Neighbor of Mary | 16 |
| Neighbor of Mass. | 17 |
| Neighbor of Maui | 16 |
| Neighbor of Mauna Loa | 21 |
| Neighbor of Mauritania | 22 |
| Neighbor of McGuire A.F.B. | 26 |
| Neighbor of McGuire Air Force Base | 34 |
| Neighbor of Md. | 15 |
| Neighbor of Mex. | 16 |
| Neighbor of Mexico | 18 |
| Neighbor of Mich. | 17 |
| Neighbor of Mich. and Ill. | 26 |
| Neighbor of Michigan | 20 |
| Neighbor of Mindoro | 19 |
| Neighbor of Minn. | 17 |
| Neighbor of Minn. and Mont. | 27 |
| Neighbor of Minn. and N.Y. | 26 |
| Neighbor of Minneapolis | 23 |
| Neighbor of Minnesota, Michigan and New York | 44 |
| Neighbor of Miss. | 17 |
| Neighbor of Mississippi | 23 |
| Neighbor of Mo. | 15 |
| Neighbor of Molokai | 19 |
| Neighbor of Monaco | 18 |
| Neighbor of Mont. | 17 |
| Neighbor of Montana | 19 |
| Neighbor of Montenegro | 22 |
| Neighbor of Monterey Park, briefly | 34 |
| Neighbor of Morocco | 19 |
| Neighbor of Mozambique | 22 |
| Neighbor of MT | 14 |
| Neighbor of Myanmar | 19 |
| Neighbor of N. Dak. | 19 |
| Neighbor of N.B. | 16 |
| Neighbor of N.C. | 16 |
| Neighbor of N.D. | 16 |
| Neighbor of N.H. | 16 |
| Neighbor of N.J. | 16 |
| Neighbor of N.M. | 16 |
| Neighbor of N.Y. | 16 |
| Neighbor of N.Y. and Minn. | 26 |
| Neighbor of N.Y.C. | 18 |
| Neighbor of N.Y.S.E. | 20 |
| Neighbor of Nam. and Zam. | 25 |
| Neighbor of Namibia | 19 |
| Neighbor of Namibia and Zambia | 30 |
| Neighbor of Naples | 18 |
| Neighbor of Neb. | 16 |
| Neighbor of Nepal | 17 |
| Neighbor of Neptune | 19 |
| Neighbor of Neth. | 17 |
| Neighbor of Nev. | 16 |
| Neighbor of Nevada | 18 |
| Neighbor of New Brunswick | 25 |
| Neighbor of New Guinea | 22 |
| Neighbor of New York | 20 |
| Neighbor of New York and Minnesota | 34 |
| Neighbor of New York's St. Patrick's | 44 |
| Neighbor of Newark | 18 |
| Neighbor of Niger | 17 |
| Neighbor of Nigeria | 19 |
| Neighbor of Nigeria and Togo | 28 |
| Neighbor of Nor. | 16 |
| Neighbor of Nor. and Fin. | 25 |
| Neighbor of Norge | 17 |
| Neighbor of North Cambridge, MA | 31 |
| Neighbor of Norw. | 17 |
| Neighbor of NY | 14 |
| Neighbor of Nyack, N.Y. | 23 |
| Neighbor of Oahu | 16 |
| Neighbor of Oakland | 19 |
| Neighbor of Ohio | 16 |
| Neighbor of Okla. | 17 |
| Neighbor of old Palestine | 25 |
| Neighbor of Olympus | 19 |
| Neighbor of Oman | 16 |
| Neighbor of Oman: Abbr. | 23 |
| Neighbor of Ont. | 16 |
| Neighbor of Ontario | 19 |
| Neighbor of Ontario and Huron | 29 |
| Neighbor of OR and NV | 21 |
| Neighbor of Orange | 18 |
| Neighbor of Ore. | 16 |
| Neighbor of Orlando | 19 |
| Neighbor of Pa. | 15 |
| Neighbor of Padua | 17 |
| Neighbor of Pak. | 16 |
| Neighbor of Pakistan | 20 |
| Neighbor of Paraguai | 20 |
| Neighbor of Paterson | 20 |
| Neighbor of Pelion | 18 |
| Neighbor of Penn. | 17 |
| Neighbor of Penna. | 18 |
| Neighbor of Perseus, in the night sky | 37 |
| Neighbor of Peru | 16 |
| Neighbor of Peru: Abbr. | 23 |
| Neighbor of Perugia | 19 |
| Neighbor of Pisces | 18 |