once

(r) on one occasion
- once I ran into her
in one case, one time,
(r) as soon as
- once we are home, we can rest
(r) at a previous time
- at one time he loved her
- her erstwhile writing
- she was a dancer once";
erst, erstwhile, formerly, at one time,

in one case one time erst erstwhile formerly at one time

one ONI Ono

only onus onyx

once again once and for all once in a while once more once-over