Aby/Abby: Abynissia
http://ashtender.com/gems/troops/6170
Alch: Alchemist
http://ashtender.com/gems/troops/6005
BD: Bone Dragon
Brian: Brian the Lucky
http://ashtender.com/gems/troops/6092
Bun/Bunni: Bunni’Nog
http://ashtender.com/gems/troops/6185
RAINBOW SNAKE: Couatl
Bat/CB: Crimson Bat
Cathy: Cthryzyx
Drak/Draak: Draakulis
Dracos: DRACOS 1337
EK/Khorvash/Khorv: Emperor Khorvash
FG/Mini-Groot: Forest Guardian
Gard/GA: Gard’s Avatar
Spider/GS: Giant Spider
Emo-tree: Gloom Leaf (Flavor text: Emo-tree is not amused)
Rocket: Goblin Rocket
Gorg/Gorgo//Gotha: Gorgotha
Hob: Hobgoblin
IK: Infernal King
Jarl: Jarl Firemantle
KoS: Keeper of Souls
Coro/Coronet/KC: Knight Coronet
Kruarg: Kruarg the Dread (Probably named for the sound it makes)
Nax/Krys/Shiny: Krystenax
Ana/Anariel/Lady A:
Sirrian: Luther (I occasionally mix them up)
Manti: Manticore
Mercy: This isn’t short for anything.
Morthani: Either Morthani’s Will or Morthani’s Scythe
Pharos: Pharos-ra
Elspeth: Princess Elspeth
Also might be http://gatherer.wizards.com/Pages/Card/Details.aspx?name=elspeth+tirel
Mab: Queen Mab
Ysa: Queen Ysabelle
SD: Shadow Dragon
Sooth: Soothsayer
Sylv/Salad Dragon: Sylvanimora
TDS/DS: The Dragon Soul
Maw: The Great Maw
Valk: Valkyrie
Wulf: Wulfgarok
Converter: Any troop that changes one gem type to another.
Primary converters are troops that transform any color to a specific gem type. There is one for each color, and then one to convert any color to skulls. Because of the ability to convert any color to a color of your choice, these troops are considered some of the strongest in the game for their ability to foster synergies and provide entire teams with mana, often without even passing the turn to your opponent.
Primary Converters:
Alchemist: Yellow
http://ashtender.com/gems/troops/6005
Apothercary: Brown
Giant Spider: Purple
Green Seer:Green
Hellcat: Red
Valkyrie: Blue
Keeper of Souls: Skulls
Finley is an odd case here, sitting between primary and secondary converters as he converts a set gem type (Skulls) to any color, so he gets a special mention.
Secondary converters are a bit more niche and change a set gem type to another set gem type, such as changing all blue gems to purple or so on.
Secondary converters:
Anointed One: Green → Red
http://ashtender.com/gems/troops/6152
Banshee: Blue → Red
http://ashtender.com/gems/troops/6053
Bastite Priestess: Green → Purple, Yellow → Skulls
http://ashtender.com/gems/troops/6299
Deck Hand: Purple → Blue
http://ashtender.com/gems/troops/6270
Drake Rider: Yellow → Red
http://ashtender.com/gems/troops/6133
Forest Guardian: Purple → Skulls, Green → Brown
http://ashtender.com/gems/troops/6298
Green Slime: Green → Purple
http://ashtender.com/gems/troops/6163
Infernal King: Green → Skulls, Brown → Red
Mercy: Purple → Yellow
Naga Queen: Brown → Red
http://ashtender.com/gems/troops/6203
Pharos-ra: Yellow → Purple
Shadow Dragon: Yellow → Purple
Sheggra: Red → Skulls
http://ashtender.com/gems/troops/6065
Sunsail: Yellow → Brown
http://ashtender.com/gems/troops/6281
Sylvasi: Blue → Purple
http://ashtender.com/gems/troops/6104
Templar: Red → Green
http://ashtender.com/gems/troops/6100
Villager: Yellow → Brown
http://ashtender.com/gems/troops/6295
Werewolf: Purple → Blue
http://ashtender.com/gems/troops/6294
Winged Bison: Purple → Red
http://ashtender.com/gems/troops/6242