Synonyms for the phrase "watering mouth" include "salivating," "drooling," "slobbering," "mouth-watering," and "juicy." These words all describe the sensation of increased saliva production in response to the anticipation of tasty food or drink. Another similar phrase might be "licking one's lips," which also conveys the image of someone eagerly preparing to consume something appealing. These expressions are common in descriptions of delicious meals, appetizing aromas, and other sensory pleasures that stimulate the taste buds. Overall, there are many ways to express the concept of having a watering mouth, each with its own subtle connotations and shades of meaning.