General satisfaction:
* kasiyahan (formal)
* kagalakan (more emotional, joy)
* kontento (contentment)
Satisfaction as a result of fulfilling a need or desire:
* pagkakasapat (sufficiency)
* kasiyahan (formal)
* pagkalugod (pleasure)
Satisfaction in a business or customer service context:
* kasiyahan ng customer (customer satisfaction)
* pagiging kuntento (contentment)
The best translation will depend on the specific situation.