twelvemonth

NOUN /twɛlvmənθ/
11 LETTERS · 2 SYLLABLES · STARTS WITH T

twelvemonth is a valid 11-letter word worth 22 points in Scrabble and 25 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
T1W4E1L1V4E1M3O1N1T1H4
1 + 4 + 1 + 1 + 4 + 1 + 3 + 1 + 1 + 1 + 4 =22 PTS
DOUBLE WORD → 44TRIPLE WORD → 66
MEANING

What does twelvemonth mean?