What is the combination of two words as one?

You're asking about a portmanteau, which is a word formed by combining parts of two words, often by blending their sounds.

Here are some examples:

* Smog (smoke + fog)

* Brunch (breakfast + lunch)

* Spork (spoon + fork)

* Motel (motor + hotel)

* Frenemy (friend + enemy)

Do you have a specific combination in mind? I'd be happy to help you create a portmanteau!