instantaneously Synonyms

in a flash outright instantly immediately right now chop-chop in short order meteorologically in an instant just then in a second straightaway unexpectedly asap all at once all of a sudden surprisingly like a shot right away straight off in a moment in no time in a trice on the spur of the moment without delay there and then this instant straight away pronto precipitously on the spot in haste in a jiffy in the twinkling of an eye before you can say Jack Robinson as soon as possible expeditiously suddenly unhesitatingly posthaste passingly now momentarily instanter incontinently hereupon hastily forthwith fleetly fleetingly