stimulus word

13 LETTERS · STARTS WITH S

stimulus word is a valid 13-letter word worth 18 points in Scrabble and 22 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

S1T1I1M3U1L1U1S1W4O1R1D2

1 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 0 + 4 + 1 + 1 + 2 =18 PTS

DOUBLE WORD → 36TRIPLE WORD → 54

MEANING

What does stimulus word mean?