General:
* Call
* Convoke
* Convene
* Invite
* Request
* Entice
* Command
* Order
* Incite
* Elicit
* Draw
To call forth or bring about:
* Evoke
* Invoke
* Produce
* Generate
* Arouse
* Stir
* Unleash
To call someone to appear:
* Cite
* Cite to appear
* Subpoena
* Enlist
To gather or assemble:
* Assemble
* Rally
* Muster
* Mobilize
To magically bring forth:
* Conjuring
* Incantation
* Spell
* Chant
To bring to mind:
* Recall
* Remember
* Recollect
The best synonym to use depends on the specific context and the nuance you want to convey.