What is another word for commence?

There are many words you could use instead of "commence," depending on the context and desired tone. Here are some options:

Formal:

* Begin

* Start

* Initiate

* Inaugurate

* Embark

* Launch

* Open

* Enter

* Set in motion

Informal:

* Kick off

* Get started

* Get going

* Go ahead

* Hit the ground running

Other options:

* Resume

* Continue

* Proceed

* Progress

* Advance

* Carry on

The best alternative will depend on the specific situation.