ocellated/ʹosilaytid, ohʹselaytid/ adj

• opium poppy
• opossum
• opp.
• opponent
• opportune
• opportunism
• opportunist
• opportunistic
• opportunity
• opposable
• oppose
• opposed
• opposite
• opposite number
• opposition
• oppress
• oppression
• oppressive
• opprobrious
• opprobrium
• oppugn
• ops
• -opsis
• opsonin
• -opsy