Synonyms of suddenly

Adverb

1. suddenly, all of a sudden, of a sudden

usage: happening unexpectedly; "suddenly she felt a sharp pain in her side"

2. abruptly, suddenly, short, dead

usage: quickly and without warning; "he stopped suddenly"

3. on the spur of the moment, suddenly

usage: on impulse; without premeditation; "he decided to go to Chicago on the spur of the moment"; "he made up his mind suddenly"