Addiction at least is quite straightforward to differentiate from otherwise engaging things by whether it causes significant harmful effects. E.g. per Wikipedia

Addiction at least is quite straightforward to differentiate from otherwise engaging things by whether it causes significant harmful effects. E.g. per Wikipedia "Addiction is a neuropsychological disorder characterized by a persistent and intense urge to use a drug or engage in a behavior that produces an immediate psychological reward, despite substantial harm and other negative consequences." Addictive would be then something that (for a substantial portion of population) has a tendency to cause addiction.