Synonyms of unremembered

1 Syllable
past, gone, dead
2 Syllables
misspent, ruined, lapsed, wasted, wrecked
3 Syllables
squandered, consumed, perished, frittered, bygone, misused, out-of-date, forgotten
4 Syllables
unremarked, dissipated, unobserved, devastated, unnoticed, demolished, abolished, obsolete
5 Syllables
obliterated, exterminated, eradicated, annihilated