"Turned on to" is a phrase that is often used to describe a feeling of excitement or interest in something. There are plenty of synonyms for this phrase that can be used to express the same emotion. Some of the most common synonyms include "hooked on", "enthralled by", "intrigued with", "captivated by", and "fascinated with". These phrases can be used to describe a variety of scenarios and situations, from a new hobby or pastime to a particular form of entertainment or even a romantic interest. No matter what the context, there is always a synonym that can be used to describe the feeling of being "turned on to" something.