basement Synonyms

cellar underbuilding undercroft underground underpart underpinning underside vault wall winery bedrock sole subterraneous subterranean stereobate storeroom storey stylobate subsoil substrate substratum substruction substructure subterrane grounder understructure ground floor root cellar strong room subbasement wine cellar Cellars sub-basement nether portion underground room lower ground floor lower floor playroom subsurface powder room undercarriage glory hole first floor ground level ft lumberyard burial chamber recreation room HQ lower level