this minute

directly forthwith instantly promptly rapidly shortly soon urgently

now

PDQ anon at short notice away double-time hereupon in a New York minute in a flash in a jiffy in nothing flat instantaneously instanter like now now or never on the dot on the double on the spot pronto right now soon afterward straight away straight off summarily thereupon this instant tout de suite unhesitatingly without delay without hesitation

later

eventually never

directly immediately instantaneously right away

forthwith now

PDQ at once away double-time first off in a flash instanter on a dime pronto right spontaneously straight away there and then tout de suite without delay

later

eventually