phantom acceleration

20 LETTERS · STARTS WITH P

phantom acceleration is a valid 20-letter word worth 30 points in Scrabble and 36 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

P3H4A1N1T1O1M3A1C3C3E1L1E1R1A1T1I1O1N1

3 + 4 + 1 + 1 + 1 + 1 + 3 + 0 + 1 + 3 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 =30 PTS

DOUBLE WORD → 60TRIPLE WORD → 90

MEANING

What does phantom acceleration mean?