General:
* Sanctuary: This is a close synonym and often used for a place of safety or refuge.
* Refuge: Similar to sanctuary, but can also be used for temporary shelter.
* Asylum: A place of safety and protection, especially for refugees.
* Shelter: A place to protect oneself from the elements or danger.
* Retreat: A place to withdraw from the world and relax.
More specific:
* Harbor: This word is specifically used for a safe place for ships.
* Oasis: A place of peace and beauty in a barren landscape.
* Safe haven: This phrase emphasizes the security of the place.
* Nest: Often used figuratively to describe a cozy and comfortable home.
* Paradise: A perfect or idyllic place.
Figurative:
* Solace: Comfort or relief from pain or distress.
* Peace: A state of tranquility and freedom from disturbance.
* Comfort: A feeling of well-being and security.
The best synonym for "haven" depends on the specific context and what you want to emphasize.