General:
* Clutch
* Grip
* Grasp
* Squeeze
* Clasp
* Clench
More specific:
* Embrace (holding something close)
* Seize (taking hold forcefully)
* Wring (twisting something tightly)
* Enfold (holding something within)
* Hug (holding something tightly in your arms)
Figurative:
* Entwine (holding something tightly with something else)
* Bind (holding something together)
* Secure (holding something firmly in place)
* Fasten (holding something securely)
The best word will depend on the specific situation and the emotion you want to convey.