1. Sleep inducing
   - soporific, somniferous, somnific, hypnogogic, hypnagogic 
2. Inducing mental lethargy
   - narcotic, soporific

See also: depressant, uninteresting

• repulsive force
• repulsively
• repulsiveness
• repurchase
• reputability
• reputable
• reputably
• reputation
• repute
• reputedly
• repêchage
• request
• requested
• requester
• requiem
• requiem shark
• requiescat
• require
• required
• required course
• requirement
• requirements contract
• requisite
• requisiteness
• requisition