underlayment
[ uhn-der-ley-muh nt ]
/ ˌʌn dərˈleɪ mənt /
noun
material laid between a subfloor and a finish floor of linoleum, asphalt tile, etc.
Words nearby underlayment
underkill,
underlaid,
underlap,
underlay,
underlayer,
underlayment,
underleaf,
underlet,
underlie,
underline,
underlinen