Have been wondering why you heard different terms but seems to refer only to a single hero? Wonder no more, with this article you'll learn who is who and how heroes were fondly called by your friends.
Heroes - Proper name, class, commonly refered to as.
* Abaddon, the Lord of Avernus: LoA, Abaddon, Avernus
* Aggron Stonebreaker, the Ogre Magi: Ogre Magi, Ogre
* Aiushtha, the Enchantress: Enchantress, Enchant
* Akasha, the Queen of Pain: QoP, Queen
* Anub'arak, the Nerubian Assassin: Nerub, NA
* Anub'seran, the Nerubian Weaver: Nerub, Weaver
* Atropos, the Bane Elemental: Bane
* Azwraith, the Phantom Lancer: PL, Lancer, Azwraith
* Balanar, the Night Stalker: NS
* Banehallow, the Lycanthrope: Lycan, Bane, Wolf
* Barathrum, the Spiritbreaker: SB, Cow
* Black Arachnia, the Broodmother: Spider, Brood, BM
* Bone Clinkz, the Bone Fletcher: Clinkz, Bone, Fletcher
* Boush, the Tinker: Tinker
* Bradwarden, the Centaur Warchief: Centaur, Brad, Cent
* Chen, the Holy Knight: Chen
* Crixalis, the Sand King: Sand King, SK
* Darchrow, the Enigma: Enigma, Nigma
* Darkterror, the Faceless Void: Void, Faceless, Darkterror, FV
* Demnok Lennik, the Warlock: Warlock
* Ezalor, the Keeper of the Light: KotL, Keeper
* Furion, the Prophet: Furion, Prophet
* Gondar, the Bounty Hunter: BH, Bounty
* Harbinger, the Obsidian Destroyer: Harbinger, OD, Obs
* Jah'rakal, the Troll Warlord: Troll
* Jakiro, the Twin Head Dragon: Jakiro
* Kardel Sharpeye, the Dwarven Sniper: Sniper
* Kel'Thuzad, the Lich: Lich
* King Leoric, the Skeleton King: SK, Leo
* Knight Davion, the Dragon Knight: DK
* Krobelus, the Death Prophet: DP
* Lesale Deathbringer, the Venomancer: Veno, Venom
* Leshrac the Malicious, the Tormented Soul: Leshrac, Lesh
* Leviathan, the Tidehunter: TH, Levi, Tide
* Lina Inverse, the Slayer: Lina, Slayer
* Lion, the Demon Witch:Lion
* Lucifer, the Doom Bringer: Doom, Lucy
* Luna Moonfang, the Moon Rider: Luna
* Magina, the Anti-Mage: AM, Magina
* Magnus, the Magnataur:Magnus
* Mangix, the Pandaren Battlemaster: Panda
* Medusa, the Gorgon: Dusa, Medusa
* Mercurial, the Spectre: Spectre, Spec, (also, residing from older versions: Vengeance, Avatar, AoV)
* Mogul Kahn, the Axe: Axe
* Morphling, the Morphling: Morphling, Morph
* Mortred, the Phantom Assassin: PA, Mortred, Mort
* N'aix, the Lifestealer: Naix
* Nessaj, the Chaos Knight: CK, Chaos
* Nevermore, the Shadow Fiend: Nevermore, Fiend
* Nortrom, the Silencer: Silencer
* Pudge, the Butcher: Pudge, Butcher
* Pugna, the Oblivion: Pugna
* Purist Thunderwrath, the Omniknight: Omni, Omniknight
* Raigor Stonehoof, the Earthshaker: Earthshaker, ES
* Razor, the Lightning Revenant: Razor
* Razzil Darkbrew, the Alchemist: Alch
* Rexxar, the Beast Master: Rexxar, BM
* Rhasta, the Shadow Shaman: Rhasta
* Rigwarl, the Bristleback: Bristle, BB, Rigwarl
* Rikimaru, the Stealth Assassin: Riki, SA
* Rooftrellen, the Treant Protector: Roof, Tree
* Rotund'Jere, the Necrolyte: Necrolyte
* Rylai Crestfall, the Crystal Maiden: CM, Rylai, Crystal
* Shandelzare Silkwood, the Vengeful Spirit: VS, Venge
* Slardar, the Slithereen Guard: Slardar
* Slithice, the Naga Siren: Siren
* Squee and Spleen, the Goblin Techies: Techies
* Strygwyr, the Bloodseeker: BS, Strygwyr, Blood, Seeker
* Sven, the Rogue Knight: Sven
* Syllabear, the Lone Druid: Sylla
* Terrorblade, the Soul Keeper: TB, SK
* Tiny, the Mountain Giant: Tiny
* Traxex, the Drow Ranger: Drow
* Ulfsaar, the Ursa Warrior: Ulfsaar, Ursa, Fuzzy-Wuzzy
* Viper, the Netherdrake: Viper
* Visage, the Necro'lic: Visage, Necrolic
* Vol'Jin, the Witch Doctor: Witch Doctor, WD
* Yurnero, the Juggernaut: Jug, Jugger
* Zeus, the Lord of Olympia: Zeus
Heroes - Proper name, class, commonly refered to as.
* Abaddon, the Lord of Avernus: LoA, Abaddon, Avernus
* Aggron Stonebreaker, the Ogre Magi: Ogre Magi, Ogre
* Aiushtha, the Enchantress: Enchantress, Enchant
* Akasha, the Queen of Pain: QoP, Queen
* Anub'arak, the Nerubian Assassin: Nerub, NA
* Anub'seran, the Nerubian Weaver: Nerub, Weaver
* Atropos, the Bane Elemental: Bane
* Azwraith, the Phantom Lancer: PL, Lancer, Azwraith
* Balanar, the Night Stalker: NS
* Banehallow, the Lycanthrope: Lycan, Bane, Wolf
* Barathrum, the Spiritbreaker: SB, Cow
* Black Arachnia, the Broodmother: Spider, Brood, BM
* Bone Clinkz, the Bone Fletcher: Clinkz, Bone, Fletcher
* Boush, the Tinker: Tinker
* Bradwarden, the Centaur Warchief: Centaur, Brad, Cent
* Chen, the Holy Knight: Chen
* Crixalis, the Sand King: Sand King, SK
* Darchrow, the Enigma: Enigma, Nigma
* Darkterror, the Faceless Void: Void, Faceless, Darkterror, FV
* Demnok Lennik, the Warlock: Warlock
* Ezalor, the Keeper of the Light: KotL, Keeper
* Furion, the Prophet: Furion, Prophet
* Gondar, the Bounty Hunter: BH, Bounty
* Harbinger, the Obsidian Destroyer: Harbinger, OD, Obs
* Jah'rakal, the Troll Warlord: Troll
* Jakiro, the Twin Head Dragon: Jakiro
* Kardel Sharpeye, the Dwarven Sniper: Sniper
* Kel'Thuzad, the Lich: Lich
* King Leoric, the Skeleton King: SK, Leo
* Knight Davion, the Dragon Knight: DK
* Krobelus, the Death Prophet: DP
* Lesale Deathbringer, the Venomancer: Veno, Venom
* Leshrac the Malicious, the Tormented Soul: Leshrac, Lesh
* Leviathan, the Tidehunter: TH, Levi, Tide
* Lina Inverse, the Slayer: Lina, Slayer
* Lion, the Demon Witch:Lion
* Lucifer, the Doom Bringer: Doom, Lucy
* Luna Moonfang, the Moon Rider: Luna
* Magina, the Anti-Mage: AM, Magina
* Magnus, the Magnataur:Magnus
* Mangix, the Pandaren Battlemaster: Panda
* Medusa, the Gorgon: Dusa, Medusa
* Mercurial, the Spectre: Spectre, Spec, (also, residing from older versions: Vengeance, Avatar, AoV)
* Mogul Kahn, the Axe: Axe
* Morphling, the Morphling: Morphling, Morph
* Mortred, the Phantom Assassin: PA, Mortred, Mort
* N'aix, the Lifestealer: Naix
* Nessaj, the Chaos Knight: CK, Chaos
* Nevermore, the Shadow Fiend: Nevermore, Fiend
* Nortrom, the Silencer: Silencer
* Pudge, the Butcher: Pudge, Butcher
* Pugna, the Oblivion: Pugna
* Purist Thunderwrath, the Omniknight: Omni, Omniknight
* Raigor Stonehoof, the Earthshaker: Earthshaker, ES
* Razor, the Lightning Revenant: Razor
* Razzil Darkbrew, the Alchemist: Alch
* Rexxar, the Beast Master: Rexxar, BM
* Rhasta, the Shadow Shaman: Rhasta
* Rigwarl, the Bristleback: Bristle, BB, Rigwarl
* Rikimaru, the Stealth Assassin: Riki, SA
* Rooftrellen, the Treant Protector: Roof, Tree
* Rotund'Jere, the Necrolyte: Necrolyte
* Rylai Crestfall, the Crystal Maiden: CM, Rylai, Crystal
* Shandelzare Silkwood, the Vengeful Spirit: VS, Venge
* Slardar, the Slithereen Guard: Slardar
* Slithice, the Naga Siren: Siren
* Squee and Spleen, the Goblin Techies: Techies
* Strygwyr, the Bloodseeker: BS, Strygwyr, Blood, Seeker
* Sven, the Rogue Knight: Sven
* Syllabear, the Lone Druid: Sylla
* Terrorblade, the Soul Keeper: TB, SK
* Tiny, the Mountain Giant: Tiny
* Traxex, the Drow Ranger: Drow
* Ulfsaar, the Ursa Warrior: Ulfsaar, Ursa, Fuzzy-Wuzzy
* Viper, the Netherdrake: Viper
* Visage, the Necro'lic: Visage, Necrolic
* Vol'Jin, the Witch Doctor: Witch Doctor, WD
* Yurnero, the Juggernaut: Jug, Jugger
* Zeus, the Lord of Olympia: Zeus