New and improved categorization of abuse and dependence just joins them, with this amazing quote in the article, where two students were trying to figure out the difference between abuse and dependence.  

“Isn’t ‘abuse’ like when you get a DUI?” said the medical student.

“Yeah,” said the psychiatry resident, “and ‘dependence’ is when you get withdrawal, right?”

“I think ‘abuse’ leads to ‘dependence,’” said the neurology resident.

“Or maybe ‘abuse’ is not as bad as ‘dependence’?”

“So what about our patient? He’s pretty hard-core.”

“I see him all the time in the emergency room. Totally intoxicated.”

“I’ve seen him drunk on the train.”

That sealed the deal.

“Dependence it is!” they all agreed.