Roget's Thesaurus: Entry 113 (Point of time Instantaneity)

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#113. [Point of time] Instantaneity. -- N. instantaneity, instantaneousness, immediacy; suddenness, abruptness.

moment, instant, second, minute; twinkling, trice, flash, breath, crack, jiffy, coup, burst, flash of lightning, stroke of time.

epoch, time; time of day, time of night; hour, minute; very minute &c., very time, very hour; present time, right time, true time, exact correct time.

V. be instantaneous &c. adj.; twinkle, flash.

Adj. instantaneous, momentary, sudden, immediate, instant, abrupt, discontinuous, precipitous, precipitant, precipitate; subitaneous[obs], hasty;quick as thought, quick as lightning, quick as a flash; rapid as electricity.

speedy, quick, fast, fleet, swift ,lively, blitz; rapid (velocity) 274.

Adv. instantaneously &c. adj.; in no time, in less than no time; presto, subito[obs], instanter, suddenly, at a stroke, like a shot; in a moment &c. n. in the blink of an eye, in the twinkling of an eye, in a trice; in one's tracks; right away; toute a l'heure[Fr]; at one jump, in the same breath, per saltum[Lat], uno saltu[Lat]; at once, all at once; plump, slap; "at one fell swoop"; at the same instant &c. n.; immediately &c. (early) 132; extempore, on the moment, on the spot, on the spur of the moment; no sooner said than done; just then; slap-dash &c. (haste) 684.

Phr. touch and go; no sooner said than done.