What is another word for "once"?

Roget's Thesaurus (1911) lists these synonyms for "once": actual, age, all, almost, alone, already, and, another, any, aorist, aoristic, article, away, being, belief, believer, between, blink, blue, body, breath, but, canonist, catholic, century, collective, community, confession, creed, crisis, current, day, declaration, denomination, denominational, diamond, different, divine, divinity, doctrine.