instantaneity

(New American Roget's College Thesaurus)

Immediate occurrence

Nouns

1. instantaneity, instantaneousness, immediacy, precipitancy (see rashness); suddenness, abruptness; moment, minute, second, instant, split second, nanosecond; twinkling, trice, flash, breath, crack, burst, flash of lightning, less than no time; jackrabbit start. See time, earliness, transientness.

2. very minute, very time, very hour; presenttime, right, true, exact, or correct time. Informal, jiffy. Slang, half a shake, sec. See chronometry.

Verbs — think on one's feet; stop in one's tracks, stop on a dime.

Adjectives — instantaneous, momentary, sudden, instant, abrupt; extemporaneous; precipitate, immediate, hasty (see haste); quick as thought or lightning.

Adverbs — instantaneously, instantly, immediately, [right] now, right off, right away, then and there, here and now; in less than no time; presto, subito, instanter, suddenly, at a stroke, word, or blow, at the drop of a hat; in a moment, in the twinkling of an eye, in a flash, at one jump, in the same breath, [all] at once; plump, slap; at one fell swoop; at the same instant; straight off, directly, immediately, cold turkey, ex tempore, on the spot, on the spur of the moment; just then; slapdash. Informal, in a jiffy, like a shot, yesterday, in nothing flat, in two shakes, before one can say Jack Robinson. Slang, like a bat out of hell.

Antonyms, see lateness, perpetuity.