What is a homonym of celler?

There is no perfect homonym for "celler." However, the closest word is "seller," which sounds the same but has a different spelling and meaning.

Here's why "celler" isn't a real word:

* "Cellar" is the correct spelling for a room below ground level, often used for storage.

* "Celler" is not a recognized word in the English language.

While "seller" isn't a perfect homonym because of the different spelling, it's the closest you'll get in terms of pronunciation.