1. Sleep inducing
   - soporific, soporiferous, somniferous, hypnogogic, hypnagogic

See also: depressant

• solarisation
• solarise
• solarium
• solarization
• solarize
• solatium
• sold
• sold-out
• solder
• solderer
• soldering
• soldering flux
• soldering iron
• soldier
• soldier grainy club
• soldier of fortune
• soldier on
• soldierfish
• soldiering
• soldierlike
• soldierly
• Soldiers of God
• soldiership
• soldiery
• soldo