KEY: Thicket.
SYN: Copse, grove, wood, jungle, forest.
ANT: Open_place, cleared_place, prairie.

• Oil_in_ill
• Oily, [See OLEAGINOUS]
• Old
• Oleaginous
• Omen
• Ominous
• Omission
• Omit
• Omnipotent
• Omniscient
• One
• Oneness, [See UNITY]
• Onerous
• Only_\a
• Only, adv
• Onset, [See ATTACK]
• Onslaught, [See ATTACK]
• Onward
• Ooze
• Opaque, [See TRANSPARENT]
• Open_\a
• Opening
• Open_\r
• Operate
• Operation