1. Intensely affecting the mind especially in producing hallucinations
   - mind-blowing

See also: psychoactive, psychotropic

• oaky
• OAP
• oar
• oared
• oarfish
• oarlock
• oarsman
• oarsmanship
• oarswoman
• OAS
• oasis
• oast
• oast house
• oat
• oat cell carcinoma
• oat grass
• oatcake
• oaten
• Oates
• oath
• oatmeal
• oatmeal cookie
• Oaxaca
• Oaxaca de Juarez
• Ob