F4I1R1E1P3R1O1O1F4E1D2
20 points
FIREPROOFED is validvalid
FIREPROOF, [v FIREPROOFED, FIREPROOFING, FIREPROOFS] : FIREPROOFING [v]
FIREPROOF, to make proof against fire [v]
FIREPROOF, [v FIREPROOFED, FIREPROOFING, FIREPROOFS] : FIREPROOFING [v]
FIREPROOF, to make proof against fire [v]