S1U1B3S1O1I1L1S1
10 points
SUBSOILS is validvalid
SUBSOIL, to plow so as to turn up the layer of earth beneath the surface soil [v]
SUBSOIL, to plow the layer of earth below the surface [v]
SUBSOIL, to plow so as to turn up the layer of earth beneath the surface soil [v]
SUBSOIL, to plow the layer of earth below the surface [v]