vowel gradation

15 LETTERS · STARTS WITH V

vowel gradation is a valid 15-letter word worth 22 points in Scrabble and 26 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

V4O1W4E1L1G2R1A1D2A1T1I1O1N1

4 + 1 + 4 + 1 + 1 + 0 + 2 + 1 + 1 + 2 + 1 + 1 + 1 + 1 + 1 =22 PTS

DOUBLE WORD → 44TRIPLE WORD → 66

MEANING

What does vowel gradation mean?