| once(adjective, adverb, late, old, past) |
| once upon a time(expression, idiom, adverb, earlier, then) |
| one-time(adjective, dead, late, old, past) |
| radically(adverb, earlier, then, before, once) |
| some time ago(expression, idiom, adverb, earlier, then) |
| sometime(adjective, dead, late, old, past) |
| time was(expression, adjective, adverb, late, old) |
| used to be(expression, idiom, adverb, earlier, then) |
| water under the bridge(expression, adjective, idiom, adverb, dead) |
| ages ago(expression, adjective, late, old, past) |
| already(adverb, earlier, then, before, once) |
| ancient(adjective, dead, late, old, past) |
| ancient history(expression, adjective, late, old, past) |
| antiquated(adjective, dead, past, lost, previous) |
| archaic(adjective, dead, past, lost, previous) |
| back(adverb, earlier, then, before, once) |
| before(adverb, earlier, then, once, erstwhile) |
| behind one(expression, adjective, late, old, past) |
| belated(adjective, dead, past, lost, previous) |
| bygone(adjective, late, old, past, previous) |