Synonyms and antonyms of Happening or done quickly, suddenly or immediately in British Thesaurus

suddenly (adverb)

quickly and without any warning

immediately (adverb)

very quickly and without delay

at once ()

immediately

straight away (adverb)

immediately

promptly (adverb)

immediately

on-the-spot (adjective)

done or happening immediately

headlong (adjective)

happening or done very quickly and without careful thought

right now ()

immediately

straight (adverb)

directly and immediately

on the spur of the moment ()

if you do something on the spur of the moment, you do it suddenly and do not take time to plan it or think carefully about it

abrupt (adjective)

sudden and unexpected, often in an unpleasant way

abruptly (adverb)

in a sudden, unexpected and often unsatisfactory way

all at once ()

very suddenly

all at once ()

happening suddenly, usually when you are not expecting it

all of a sudden ()

if something happens all of a sudden, it happens quickly, and without any sign that it is going to happen

at a glance ()

if you realize something at a glance, you realize it immediately as soon as you see someone or something

at a stroke/one stroke ()

with a single action that changes things completely

at short notice ()

without being given much warning before something happens

at the drop of a hat ()

immediately, or in a way that shows that you have no doubts about doing something

at the flick of a switch ()

quickly and easily, especially by using a computer

bang (interjection)

used for showing that something happens very quickly or suddenly

before you can say Jack Robinson (British)

Britishinformal old-fashioned immediately, or suddenly

cold (adverb)

suddenly

directly (adverb)

immediately

dramatically (adverb)

in a sudden and surprising way that is easy to notice

fast (adjective)

done quickly

fast (adjective)

done without waiting or delaying

fast (adverb)

without waiting or delaying

fast-paced (adjective)

including a lot of different things happening quickly

fast-track (adjective)

happening, developing, or progressing more quickly than usual

flash (adjective)

involving a very quick process

flat (adverb)

informal exactly: used for emphasizing how quickly something is done

forthwith (adverb)

formal immediately

immediate (adjective)

your immediate reaction to something is the first thing you think, feel, or do when it happens

impetuous (adjective)

done quickly, without thinking about what the effects will be

impulsive (adjective)

done suddenly, without thinking what the result will be

in/at one fell swoop ()

with one sudden action, or on one single occasion

instant (adjective)

immediate

instantaneous (adjective)

immediate

instantly (adverb)

immediately

just like that ()

used for emphasizing that something happens very quickly or easily

lightning (adjective)

very quick

like a shot ()

immediately and very quickly

like nobody’s business ()

used for emphasizing that something happens very quickly, in very large quantities, or that someone does something very well

the next thing I knew ()

used for saying that a situation happened very quickly when you did not expect it

no sooner said than done ()

used for emphasizing that you will do something immediately

now (adverb)

immediately, or very soon

off the top of your head ()

immediately and without thinking very much

on the spot ()

immediately

out of the blue ()

happening in a way that is sudden and unexpected, and does not seem connected with anything that happened before

pdq (adverb)

very informal pretty damn quick: used for saying that someone must do something immediately

poof (interjection)

used for saying that something happened suddenly, or that someone or something disappeared suddenly

posthaste (adverb)

literary as quickly as possible

precipitous (adjective)

happening more quickly than expected

presto (interjection)

mainly Americaninformal used for emphasizing how suddenly something happens or changes

prompt (adjective)

immediate, or quick

pronto (adverb)

informal now, or very quickly

quick (adjective)

done or happening in a short time

rapid (adjective)

happening, moving, or acting quickly

rapid-fire (adjective)

rapid-fire actions happen very quickly or within a short period of time

right (adverb)

immediately

right away ()

immediately

right/straight off ()

immediately

rude (adjective)

mainly literary used about things that happen suddenly and have a strong effect on you

sharpish (adverb)

Britishinformal immediately and quickly

short (adjective)

a period of time that is short does not last very long or seems to pass quickly

slap (adverb)

suddenly, with a lot of force

spur-of-the-moment (adjective)

sudden and not planned or thought about carefully

straight out ()

said directly and immediately

summarily (adverb)

immediately, and without following the usual official methods or processes

summary (adjective)

done immediately and without following the usual methods or processes

swift (adjective)

happening quickly or immediately

there and then ()

immediately at that moment and in that place

this instant ()

immediately: used when giving an order angrily

this minute ()

immediately, used especially for telling someone to do something at once

this minute/second ()

immediately, or just a moment ago

violently (adverb)

in a sudden way and with great energy or force

wham-bam (interjection)

very informal used for emphasizing how suddenly something happened or how suddenly it was done

without a second thought ()

acting immediately, without stopping to think

without further/more ado ()

without any delay