Sorcerer vs wizard

"Maybe not," Kincaid said. "The old ones don't need to sometimes. Mavra could be functional."
"And what's more," I said, "she's a practitioner. A sorceress at least."
Kincaid inhaled and exhaled slowly through his nose. He finished the bite he was on, and then he said, "Shit," before taking another.
Murphy frowned. "What do you mean, a sorceress at least?"
"Kind of an industry term," I said. "Plenty of people can do a little magic. Small-time stuff. But sometimes the small-timers practice up, or tap into some kind of power source and get enough ability to be dangerous. A sorcerer is someone who can do some serious violence with magic."
"Like the Shadowman," Murphy said. "Or Kravos."
"Yeah."
"Good thing we got a wizard along then," Kincaid said.
Murphy looked at me.
"Wizard means that you can do sorcery if you need to," I said, "but it also means you can do a lot of other things too. A wizard's power isn't limited to blowing things up, or calling up demons. A good wizard can adapt his magic in almost any way he can imagine. Which is the problem."
"What do you mean?" Murphy said.
"Mavra is good at veils," I said, mostly to Kincaid. "Real good. She did some long range mental communications last night, too."
Kincaid stopped eating.
"You're saying that this vampire is a wizard?" Murphy asked.

Blood Rites Chapter 23, Page 186-187