W4I1N1D2M3I1L1L1I1N1G2
18 points
WINDMILLING is validvalid
WINDMILL, to rotate solely under the force of a passing airstream [v]
WINDMILL, to rotate from the force of air [v]
WINDMILL, to rotate solely under the force of a passing airstream [v]
WINDMILL, to rotate from the force of air [v]