major form class

NOUN
16 LETTERS · STARTS WITH M

major form class is a valid 16-letter word worth 30 points in Scrabble and 36 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
M3A1J8O1R1F4O1R1M3C3L1A1S1S1
3 + 1 + 8 + 1 + 1 + 0 + 4 + 1 + 1 + 3 + 0 + 3 + 1 + 1 + 1 + 1 =30 PTS
DOUBLE WORD → 60TRIPLE WORD → 90
MEANING

What does major form class mean?

NOUN · 1 SENSE
1

Any of the major parts of speech of traditional grammar.