Basement or cellar.
The opposite (antonym) would be basement or cellar,or pretty much anything below ground since an attic is at the top part of a house.
The word 'cellar' is both a verb (cellar, cellars, cellaring, cellared), and a noun (cellar, cellars). Example uses:Verb: He's an avid collector, he has a place underground to cellar his wine.Noun: We've converted the cellar into a playroom.
multi cellar means
i have a cellar
A synonym for cellar is basement.
Out of the Cellar was created in 1983.
cellar doors
A cellar is always underground, so you can just call it a cellar. A cellar is where you'd store stuff like food or random items.
the cellar smells bad
Cellar has two syllables.
Granny is down in the root cellar, right now. The cellar is flooded, again.