Silence and Ultima both have been used.
Yliette, you cannot used the word that have been given, unless you did not noticed the word is already used and the next person will do two ways:

Fiend - Don Tonberry - Yuna - Al Bhed - Dona - Anima - Auron - Nirvana - Adamantoise - Eternal Calm - Mega Potion - Nodes - Sin - Nemesis - Spectral Keeper - Rin - Nul Blaze - Evrae - Evrae Altana - Aeons - Seed Cannon - Naida - Avenger - Ronso - Omega Weapon - Nul Tide - Echo Shield - Doublecast - Tidus - Sphere - Evrae - Ether- Remiem Temple - Exoray - Yunalesca - Ahriman - Nega Elemental - Land Worm - Mushussu - Ultima Weapon - Neslug - Garuda - Achelous - Sleep Attack - Kilika - Aerouge - Elixir - Remora - Aerospark - Kimahri - Ipiria - Airship - Pilgrimage - Epaaj - Jecht - Tonberry - Yojimbo - Omega Ruins - Silence - Evade & Counter - Remedy - Yu Yevon - Negator - Rikku - Ultima - Anima - Auto-Life - Evil Eye - Ether - Ragnarok - Kilika Temple - Excalibur - Rolling Thunder - Rin's Travel Agency - Yevon - Nebiros - Shinryu - Untouchable - Elma - Aqua Flan - Nova - Ahriman - Nul Shock - Kimahri - Isaaru - Undefeated - Defender X - Xiphos - Seymour - Red Elemental - Lulu - Unlimited - Dragon Fang - Gagazet - Trommel - Luca - Anacondaur - Ropp - Pterya - Abaddon - Nidhogg - Gillionaire - Elite Defense - Earth Eater - Raldo - Osmose - Espada - Arm - Mech Guard - Djose - Eye Drops - Shimmering Blade - Elma - Auron - Nedus - Sandy - Yunalesca - Amulet - Thundaga - Alert Shield - Demi - Ironclad - Deathproof - Firaga - Alcyone - Extract Power - Ragora - Aim - Mage - Esuna - Aqua Breath - Haste - Executioner - Rising Sun - Nul Shock - Kazuka - Abyss Worm - Mars Sigil - Lucil - Larva - Auto-Phoenix - X-Potion - Noxious Cait Sith - Hastega - Ascalon - Nab Gil - Lamashtu - Ultima Buster - Reflex - Xiphos - Steal - Lightning Bolt - Taming Sword - Demonolith - Home - Energy Ray - Yaibal - Lightning - Geneaux's Tentacle - Extractor - Remiem Temple - Extract Mana - Auroch Reels - Spiral Cut - Thunder Plains - Seymour Flux - Xiphios - Seymour Natus - Slow - Wakka - Aurochs - Sleep Sprout - Thunder - Ronso Rage - Endurance - Energy Blast - Triple Foul - Longsword - Death - Hellfire - Enigma - Arctic Wind - Deathstrike - Equipment - Thor's Hammer - Regen - Noy Guado - Oblitzerator - Ruin of Zanarkand - Doom - Mega-potion - Seymour Omnis - Scoring Spree - Elemental Reels - Sorrow of Spira - Auda Guado - Ominous Mog - Gambler's Spirit - Tobli - Inflicts - Stickyfingers - Sphere Grids - Silence - Enchanted Rod - Death - Hastega - Auto-Med - Damage - Enchanted Sword - Dingo - Oblivion - NulBlaze- Bomb - Brotherhood - Doom - Murrussu - Use

Use is one of special abilities

Or..

Fiend - Don Tonberry - Yuna - Al Bhed - Dona - Anima - Auron - Nirvana - Adamantoise - Eternal Calm - Mega Potion - Nodes - Sin - Nemesis - Spectral Keeper - Rin - Nul Blaze - Evrae - Evrae Altana - Aeons - Seed Cannon - Naida - Avenger - Ronso - Omega Weapon - Nul Tide - Echo Shield - Doublecast - Tidus - Sphere - Evrae - Ether- Remiem Temple - Exoray - Yunalesca - Ahriman - Nega Elemental - Land Worm - Mushussu - Ultima Weapon - Neslug - Garuda - Achelous - Sleep Attack - Kilika - Aerouge - Elixir - Remora - Aerospark - Kimahri - Ipiria - Airship - Pilgrimage - Epaaj - Jecht - Tonberry - Yojimbo - Omega Ruins - Silence - Evade & Counter - Remedy - Yu Yevon - Negator - Rikku - Ultima - Anima - Auto-Life - Evil Eye - Ether - Ragnarok - Kilika Temple - Excalibur - Rolling Thunder - Rin's Travel Agency - Yevon - Nebiros - Shinryu - Untouchable - Elma - Aqua Flan - Nova - Ahriman - Nul Shock - Kimahri - Isaaru - Undefeated - Defender X - Xiphos - Seymour - Red Elemental - Lulu - Unlimited - Dragon Fang - Gagazet - Trommel - Luca - Anacondaur - Ropp - Pterya - Abaddon - Nidhogg - Gillionaire - Elite Defense - Earth Eater - Raldo - Osmose - Espada - Arm - Mech Guard - Djose - Eye Drops - Shimmering Blade - Elma - Auron - Nedus - Sandy - Yunalesca - Amulet - Thundaga - Alert Shield - Demi - Ironclad - Deathproof - Firaga - Alcyone - Extract Power - Ragora - Aim - Mage - Esuna - Aqua Breath - Haste - Executioner - Rising Sun - Nul Shock - Kazuka - Abyss Worm - Mars Sigil - Lucil - Larva - Auto-Phoenix - X-Potion - Noxious Cait Sith - Hastega - Ascalon - Nab Gil - Lamashtu - Ultima Buster - Reflex - Xiphos - Steal - Lightning Bolt - Taming Sword - Demonolith - Home - Energy Ray - Yaibal - Lightning - Geneaux's Tentacle - Extractor - Remiem Temple - Extract Mana - Auroch Reels - Spiral Cut - Thunder Plains - Seymour Flux - Xiphios - Seymour Natus - Slow - Wakka - Aurochs - Sleep Sprout - Thunder - Ronso Rage - Endurance - Energy Blast - Triple Foul - Longsword - Death - Hellfire - Enigma - Arctic Wind - Deathstrike - Equipment - Thor's Hammer - Regen - Noy Guado - Oblitzerator - Ruin of Zanarkand - Doom - Mega-potion - Seymour Omnis - Scoring Spree - Elemental Reels - Sorrow of Spira - Auda Guado - Ominous Mog - Gambler's Spirit - Tobli - Inflicts - Stickyfingers - Sphere Grids - Silence - Enchanted Rod - Death - Hastega - Auto-Med - Damage - Enchanted Sword - Dingo - Oblivion - NulBlaze- Bomb - Brotherhood - Doom - Murrussu - Ultima - Magus Sisters - Silence - Entrust