The following are instances of तत्पुरुष:
1. सामान्य - general - when except प्रथमा, we have omission of विभक्ति.
2. नञ् - non- i.e. negation sense
3. कर्मधारय - adjective-based
4. प्रादि - prefix-related
5. गति - mobility-sense
6. उपपद - "related" sense