Everybody loves to make up different names for their classes in RPGS, in pretense of having any individuality at all. The basic is replacing
Fighter with Warrior, but then you do all sorts of stuff like replacing Ranger with Scout or Hunter. Cleric is sometimes replaced by the name Priest but both generally mean the same thing, A Cleric is different from the more noncombat Healer however. The Rogue however is very widespread in meaning, ranging from Thief/Robber type to Ninja/Assassin type.