| Acronym | Definition |
|---|
| TWh | TeraWatt Hour(s) |
| TWh | Tennessee Walking Horse |
| TWh | Tankless Water Heater |
| TWh | Total Worker Health (various organizations) |
| TWh | Three Way Handshake |
| TWh | Toronto Western Hospital (Toronto, ON Canada) |
| TWh | Town House |
| TWh | Temporary Worker Housing |
| TWh | The Washington Home (Washington, DC) |
| TWh | The Wounded Healer (child abuse support community) |
| TWh | Tuesday, Wednesday, Thursday |
| TWh | Technical Warrant Holder (organization of technical authority) |
| TWh | The Whore House |
| TWh | The Woman-Hunter |
| TWh | This Won't Help |
| TWh | Thresholding with Hysteresis |