"Adding zing" is an idiom that refers to adding extra excitement, flavor, or interest to something. There are numerous different synonyms that can be used in place of this phrase to convey a similar meaning. Some possible options include "spicing up," "infusing with energy," "injecting excitement," "enhancing," "enlivening," "stimulating," "revitalizing," "invigorating," "embellishing," "ornamenting," and "brightening." Each of these alternatives captures a slightly different nuance of what it means to add zing to something, but they all convey the idea of making something more engaging and exciting. When writing or speaking, choosing the right synonym can help to add variety and interest to your language and convey your ideas more clearly.