| major(adjective, important, significant, original, essential) |
| meat-and-potatoes(adjective, important, significant, original, essential) |
| medieval |
| moth-eaten(last, original, old, venerable, outdated) |
| natal |
| necessary(adjective, important, significant, original, essential) |
| newborn(adjective, beginning) |
| numero uno(expression, adjective, head, beginning, prime) |
| obsolete(original, old, venerable, antique, archaic) |
| of old(expression, last, original, primitive, outdated) |
| of yore(expression, last, original, primitive, outdated) |
| old-fashioned(original, old, venerable, outdated, antique) |
| oldfangled(last, original, past, primitive, venerable) |
| once(last, original, past, primitive, venerable) |
| onetime(last, original, past, primitive, venerable) |
| opening(adjective, head, beginning, original, prime) |
| origin |
| out-of-date(original, old, venerable, antique, archaic) |
| outdated(last, original, previous, venerable, other) |
| outmoded(original, old, venerable, obsolete, antique) |