What do you call a sentence without commas?

There isn't a specific name for a sentence without commas. It's simply a sentence that doesn't use commas for punctuation.

However, you could describe it as:

* A simple sentence: If it only has one independent clause.

* A short sentence: If it has few words.

* A sentence without internal punctuation: If you want to emphasize the lack of commas.

Ultimately, the best way to describe it depends on the context and the specific features of the sentence.