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

See also: depressant

• discoverer
• discovery
• Discovery Day
• discredit
• discreditable
• discreditably
• discredited
• discreet
• discreetly
• discreetness
• discrepancy
• serpent
• serpent fern
• serpent star
• serpent-worship
• Serpentes
• serpentine
• serpiginous
• Serra
• serranid
• serranid fish
• Serranidae
• Serranus
• Serranus subligarius
• Serrasalmus