main thing

10 LETTERS · STARTS WITH M

main thing is a valid 10-letter word worth 15 points in Scrabble and 18 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

M3A1I1N1T1H4I1N1G2

3 + 1 + 1 + 1 + 0 + 1 + 4 + 1 + 1 + 2 =15 PTS

DOUBLE WORD → 30TRIPLE WORD → 45

MEANING

What does main thing mean?