The word "yaying" has many synonyms that can be used to express happiness, excitement, and joy. Some of the common synonyms for "yaying" include cheering, applauding, hooting, whooping, and clapping. These words are often used in a celebratory context, where people express their happiness and appreciation for something or someone. Other similar words for "yaying" might include exulting, rejoicing, and celebrating. Each of these synonyms can be used to convey a slightly different tone or level of enthusiasm, allowing the speaker or writer to express their emotions in a more nuanced way.