AT ONCE, right away, (right) now, this/that (very) minute, this/that instant, immediately, instantly, directly, forthwith, without further/more ado, promptly, quickly, without delay, then and there, here and now, a.s.a.p., as soon as possible, as quickly as possible; N. Amer. in short order; informal straight off, in double quick time, p.d.q., pretty damn quick, pronto, before you can say Jack Robinson; N. Amer. informal lickety-split; archaic straight, straightway.
2192; headword