Once
(adv.) By limitation to the number one; for one time; not twice nor any number of times more than one.
(adv.) At some one period of time; -- used indefinitely.
(adv.) At any one time; -- often nearly equivalent to ever, if ever, or whenever; as, once kindled, it may not be quenched.
Similar Words:
Attonce Bonce Conceal Concealable Concealed Concealer Concealing Concealment Concede Conceded