| Acronym | Definition |
|---|
| RTH | Rock the House |
| RTH | Resistance to Thyroid Hormone |
| RTH | Roy Thompson Hall (Canada) |
| RTH | Regular Trading Hours |
| RTH | Red Tailed Hawk |
| RTH | Return to Home (radio controlled aircraft) |
| RTH | Regency Town House (Brighton & Hove, East Sussex, UK) |
| RTH | Round the House |
| RTH | Right to Hire |
| RTH | Regional Telecommunication Hub |
| RTH | Ready-To-Heat (food) |
| RTH | Raise the Hoof |
| RTH | Reconnaissance Travailleur Handicapé (French: Disabled Worker Recognition) |
| RTH | Recreation, Tourism, and Hospitality Management (University of North Carolina Greensboro) |
| RTH | Rapana Thomasiana Hemocyanin |
| RTH | Regional Transport Hub (business) |
| RTH | Robert Treat Hotel (Newark, NJ) |