T1R1I1C3K5S1Y4
16 points
TRICKSY is validvalid
mischievous [adj TRICKSIER, TRICKSIEST] : TRICKSINESS [n]
mischievous [adj TRICKSIER, TRICKSIEST, TRICKSILY]
mischievous [adj TRICKSIER, TRICKSIEST] : TRICKSINESS [n]
mischievous [adj TRICKSIER, TRICKSIEST, TRICKSILY]