What is another word for the US legislative branch?

There isn't one single perfect synonym for the US legislative branch, but here are some options depending on the context:

* Congress: This is the most common and direct synonym. It refers to both the House of Representatives and the Senate collectively.

* Legislature: This is a more general term that applies to any lawmaking body.

* Lawmaking body: A more formal and descriptive phrase.

* Parliament: While technically not synonymous, this term is sometimes used informally to refer to the US Congress, particularly in a comparative context.

The best choice depends on the specific situation and the desired level of formality.