
1) At once 2) Directly 3) Forthwith 4) Immediately 5) Immediately like some coffee 6) In real time 7) Like a flash 8) Like a shot 9) Right away 10) Straight off 11) Straightaway 12) Urgently 13) With no time intervening 14) Without any delay 15) Without delay or hesitation
Found on
https://www.crosswordclues.com/clue/instantly

1) At once 2) Forthwith 3) Immediately 4) In a split second 5) In a trice 6) In a wink 7) Innotimeflat 8) Instantaneously 9) Like a shot 10) Momentarily 11) Quick as a wink
Found on
https://www.crosswordclues.com/clue/instantly

• (adv.) Without the least delay or interval; at once; immediately. • (adv.) With urgency or importunity; earnestly; pressingly.
Found on
http://thinkexist.com/dictionary/meaning/instantly/
In'stant·ly adverb 1. Without the least delay or interval; at once; immediately.
Macaulay. 2. With urgency or importunity; earnestly; pressingly. 'They besought him
instantly .'
Luke vii. 4. Syn. -- Directly; immediately; at once. See
Directly .
Found on
http://www.encyclo.co.uk/webster/I/70

immediately; at once. · urgently.
Found on
https://www.infoplease.com/dictionary/instantly
No exact match found.