What is a synonym for tarmac?

Here are some synonyms for tarmac, depending on the context:

Formal:

* Asphalt

* Pavement

* Runway (when referring specifically to airport surfaces)

Informal:

* Blacktop

* Macadam

* Hardstand (for a parking area)

The best synonym will depend on what you're trying to describe. For example, "asphalt" is a more general term than "runway" and is often used in place of tarmac when referring to roads.