adverbial noun

14 LETTERS · STARTS WITH A

adverbial noun is a valid 14-letter word worth 19 points in Scrabble and 25 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

A1D2V4E1R1B3I1A1L1N1O1U1N1

1 + 2 + 4 + 1 + 1 + 3 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 1 =19 PTS

DOUBLE WORD → 38TRIPLE WORD → 57

MEANING

What does adverbial noun mean?