S1O1U1N1D2P3R1O1O1F4I1N1G2
20 points
SOUNDPROOFING is validvalid
the act of soundproofing [n SOUNDPROOFINGS] / SOUNDPROOF, [v SOUNDPROOFED, SOUNDPROOFING, SOUNDPROOFS] : SOUNDPROOFING [v]
insulation to obstruct the passage of sound [n -S]
the act of soundproofing [n SOUNDPROOFINGS] / SOUNDPROOF, [v SOUNDPROOFED, SOUNDPROOFING, SOUNDPROOFS] : SOUNDPROOFING [v]
insulation to obstruct the passage of sound [n -S]