| Abbreviation | Definition |
|---|---|
| RTH | Red Tailed Hawk |
| RTH | Refrigeration Ton hour |
| RTH | Regency Town House |
| RTH | Relationship To Head |
| RTH | Replaceable Torch Head |
| RTH | Requirement and Testing Hub |
| RTH | Requirements and Testing Hub |
| RTH | Resistance to Thyroid Hormone |
| RTH | Return to Home |
| RTH | Rid Those Heretics |
| RTH | Rock The House |
| RTH | Roxbury Tenants of Harvard |
| RTHA | Restrictions in Trading and Holding of Assets |
| RTHD | Road Transport and Highways Division |
| RTHL | Recorded Texas Historic Landmark |
| RTHM | Real Time Hand Motion |
| RTHM | Restoring the Heart Ministries |
| RTHS | Randolph Township Historical Society |
| RTHS | Real Time Hybrid Simulation |
| RTHS | Real Time Hydrologic Station |