S1O1U1N1D2P3R1O1O1F4E1D2
19 points
SOUNDPROOFED is validvalid
SOUNDPROOF, [v SOUNDPROOFED, SOUNDPROOFING, SOUNDPROOFS] : SOUNDPROOFING [v]
SOUNDPROOF, to insulate so as to obstruct the passage of sound [v]
SOUNDPROOF, [v SOUNDPROOFED, SOUNDPROOFING, SOUNDPROOFS] : SOUNDPROOFING [v]
SOUNDPROOF, to insulate so as to obstruct the passage of sound [v]