When it comes to describing something that's truly captivating and attention-grabbing, "mouth-watering interest" isn't the only phrase that fits the bill. There are numerous synonyms and related terms that can help you convey a similar sentiment. For example, you might describe something as "compelling," "intriguing," "fascinating," or "riveting." Alternatively, you might say that you have a "keen interest" in something, or that you're "captivated" or "enchanted" by it. Other options include "absorbing," "engaging," "alluring," and "enticing." Whatever words you choose, the important thing is to convey the sense of excitement and curiosity that comes with something truly fascinating.