Evey, dependence is the same as addiction. Both are the need, the necessity, for repetitive behaviour that, if not undertaken, produces real mental and/or physical trauma in the subject. Physical addictions are easily overcome compared to psychological dependence.
There are plenty of gambling addicts. There are some on this board. You dont work in a betting shop. You, generally, sit at home online. Most gambling addictions involve compulsive behaviour with cards or roulette wheels these days, particularly on machines we used to call one armed bandits. Think about why we called them bandits.
If you have an inability to stop reproducing any trait in behaviour associated with something outside of you, that is an addiction. Shopping for clothes you neither really want or need - that's an addiction if it's a constant that you cannot break.
Dependency is just a kinder word for addiction. See also "habitual user", the PC term for heroin addicts.