- Rabies
- Racial profiling
- Radiation therapy
- Railroads
- Rain forests
- Ramadan
- Real estate
- Reality television
- Recidivism
- Recycling
- Red Cross
- Refugees
- Reggae
- Rehabilitation (physical or pertaining to substance abuse)
- Reincarnation
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- Relaxation techniques
- Religious schools
- Reproductive rights
- Reptiles
- Responsible printing
- Retirement plans
- Revolutions
- Risk management
- Robots/robotics
- RPGs (role-playing games)
- Roller coasters
- Roses
- Rosetta Stone
- Rosh Hashanah
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