I1M3P3L1O1D2E1
12 points
IMPLODE is validvalid
to collapse inward [v IMPLODED, IMPLODES, IMPLODING]
to collapse inward [v IMPLODED, IMPLODING, IMPLODES]
to collapse inward [v IMPLODED, IMPLODES, IMPLODING]
to collapse inward [v IMPLODED, IMPLODING, IMPLODES]