You've got a LOT to learn with a question like that bro. I hope that you aren't starting a cycle soon, b/c you're not ready! Here's something that might help you.
Steroids (nicknames)
Testosterone (Enan, Cyp, Prop, Sust, Omna)
Deca-Durabolin/Deca
Equipose/EQ
Dianabol/D-bol
Winstrol/Winny
Anadrol/Drol
Halotestin/Halo
Anavar/Var
Tren/Fina
Primobolan/Primo
*These are the most commonly used steroids for bodybuilding.