once Synonyms

erstwhile at one time formerly in former times upon heretofore previously once upon a time earlier as soon as long ago in the past after erst whilom when ex Kota now and then one shot sooner whenever whensoever wherever on occasion yore thitherto up to now at a time one-off no longer The moment immediately after at one point a single time on one occasion one occasion on a single occasion the instant the minute single time one-time back in the day Back Then one day onetime unrepeatable in one case in earlier times from the moment