What is another word for to establish?

Here are some synonyms for "to establish", depending on the context:

General:

* Found

* Create

* Set up

* Institute

* Inaugurate

* Start

* Begin

* Form

* Build

* Erect

* Develop

More specific:

* Confirm (to establish something as true or certain)

* Prove (to establish something with evidence)

* Secure (to establish something firmly in place)

* Determine (to establish something with certainty)

* Define (to establish the meaning of something)

* Fix (to establish something firmly)

* Settle (to establish something permanently)

Figurative:

* Plant (to establish something firmly)

* Anchor (to establish something securely)

* Ground (to establish something firmly)

The best synonym will depend on the specific context of your sentence.