Every spell

• Omen, self damage
• Omni Diffusion Armor
• On Break
• On Fire!!
• On Thin Ice
• On the Move
• One-Handed Axes
• One-Handed Maces
• One-Handed Swords
• One-Handed Weapon Specialization
• Onin's Camouflage
• Only Pain
• Onyxia
• Onyxia Scale Breastplate
• Onyxia Scale Cloak
• Onyxia Trans
• Oops!
• Ooze Covered Miner
• Oozeling's Disgusting Aura
• Open Bottle
• Open Care Package
• Open Circle
• Open Helping Hand
• Open Letter
• Open Portal
• Open Skull Geode
• Open Suspicious Supplies
• Open Wound
• Open Wound Effect
• Opening
• Opening - No Text
• Opening Azure Bag
• Opening Bar Door
• Opening Benedict's Chest
• Opening Booty Chest
• Opening Cage
• Opening Chest
• Opening Dark Coffer
• Opening Greater Scarab Coffer
• Opening Relic Coffer
• Opening Safe
• Opening Scarab Coffer
• Opening Secret Safe
• Opening Secure Safe
• Opening Stratholme Postbox
• Opening Strongbox
• Opening Termite Barrel
• Opportunity
• Oppressive Darkness
• Oracle Healing Bonus
• Oracular Heal
• Orange Coalescence
• Orange Mageweave Shirt
• Orange Martial Shirt
• Orb Shatter
• Orb of Corruption
• Orb of Deception
• Orb of FireRank 1
• Orb of Mystic Insight
• Orb of Souls
• Orbiting Chakram
• Orbs of Shadow
• Orc Mask
• Orcish
• Orcish Orphan Whistle
• Orcish Tradeskill Signpost
• Orcish War Leggings
• Orders complete!
• Orgrimmar Chest Ambush
• Orgrimmar Gift of Friendship
• Orgrimmar Reputation
• Ornate Mithril Boots
• Ornate Mithril Breastplate
• Ornate Mithril Gloves
• Ornate Mithril Helm
• Ornate Mithril Pants
• Ornate Mithril Shoulders
• Ornate Spyglass
• Ornate Thorium Handaxe
• Out of Bounds
• Out of breath!
• Outlaw's Collar
• Overcharge
• Overcharged
• Overclocked
• Overconfidence
• Overdrive
• Overflowing Light
• Overgrowth
• Overheat
• Overload
• Overloaded
• Overlook Cliffs Teleport
• Overpower4 ranks
• Override Interact Radius
• Overseer's Poison
• Overwhelming Dread
• Overwhelming Musk
• Overwhelming Stench
• Owl Companion