Synonyms of all of a sudden in English:

all of a sudden


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See UK English definition of all of a sudden

phrase

1‘when you win awards, all of a sudden magazines will call and want your opinion’

SYNONYMS
suddenly, immediately, instantaneously, instantly, in an instant, straight away, at once, all at once, promptly, abruptly, in a trice, swiftly
unexpectedly, without warning, without notice, on the spur of the moment
informal straight off, out of the blue, in a flash, like a shot, before you can say Jack Robinson, before you can say knife, in two shakes, in two shakes of a lamb's tail
ANTONYMS

gradually