Synonyms of basement

1 Syllable
floor, vault, crypt, floors
2 Syllables
cellars, bottom, cellar, bottoms, downstairs, footing
3 Syllables
substratum, lowermost, nethermost, undermost, storage
4 Syllables
subbasement, underbuilding, excavation, substructure
5 Syllables
undersurface, understructure