"Heying" is a slang word that means flirting with someone. There are several synonyms that can be used instead of "heying" depending on the context and intensity of the flirting. Some common synonyms for "heying" include "flirting," "teasing," "courting," "wooing," "charming," and "seducing." These words can describe different levels of flirting from playful banter to more serious and intentional actions. Other synonyms that can be used to describe certain aspects of flirting include "complimenting," "smiling," "laughing," "touching," "giggling," and "gazing." Each synonym provides a unique perspective on the art of expressing interest in another person.