compound engine

15 LETTERS · STARTS WITH C

compound engine is a valid 15-letter word worth 22 points in Scrabble and 30 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

C3O1M3P3O1U1N1D2E1N1G2I1N1E1

3 + 1 + 3 + 3 + 1 + 1 + 1 + 2 + 0 + 1 + 1 + 2 + 1 + 1 + 1 =22 PTS

DOUBLE WORD → 44TRIPLE WORD → 66

MEANING

What does compound engine mean?