Haven
Haven means a safe place, shelter, or peaceful refuge where someone feels protected (सुरक्षित स्थान, आश्रय, या शांत जगह)
Examples
They wanted to provide safe havens for the refugees.
The animal shelter became a safe haven.
Heaven
Heaven means a divine place, believed to be where God lives, or a state of great happiness and peace (स्वर्ग, या अत्यंत सुखद स्थिति)
Examples
Many people believe in heaven after death.
This vacation feels like heaven.