| Abbreviation | Definition |
|---|---|
| TNCCF | Tamil Nadu Consumer Complaints Forum |
| TNCP | Tamil Nadu City Police |
| TNFRS | Tamil Nadu Fire and Rescue Services |
| TNFU | Tamil Nadu Fisheries University |
| TNGST | Tamil Nadu General Sales Tax |
| TNGST | Tamil Nadu Goods and Services Tax |
| TNGST | Tamil Nadu Government Sales Tax |
| TNHB | Tamil Nadu Housing Board |
| TNLA | Tamil Nadu Liberation Army |
| TNLA | Tamil National Liberation Alliance |
| TNNLU | Tamil Nadu National Law University |
| TNOU | Tamil Nadu Open University |
| TNPC | Tamil Nadu Pharmacy Council |
| TNPL | Tamil Nadu Premier League |
| TNPSC | Tamil Nadu Public Service Commission |
| TNPSC | Tamil Nadu Public Services Commission |
| TNPSC | Tamil of Nadu public service commission |
| TNPWP | Tamil Nadu Peasants and Workers Party |
| TNRRIS | Tamil Nadu Rural Roads Improvement Scheme |
| TNSCA | Tamil Nadu State Chess Association |