all at once

ADVERB
11 LETTERS · STARTS WITH A

all at once is a valid 11-letter word worth 11 points in Scrabble and 15 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
A1L1L1A1T1O1N1C3E1
1 + 1 + 1 + 0 + 1 + 1 + 0 + 1 + 1 + 3 + 1 =11 PTS
DOUBLE WORD → 22TRIPLE WORD → 33
MEANING

What does all at once mean?

ADVERB · 1 SENSE
1

Without warning.

“all at once, he started shouting”