There are many synonyms for the word "tailwagger" which refers to a happy dog wagging its tail. Some of the synonyms for tailwagger include happy-go-lucky, cheerful, exuberant, lively, jovial, and playful. These words are often used to describe dogs that are full of energy and excitement. Other synonyms for tailwagger may include waggy, wiggler, and lively tail. Dogs that are tailwaggers tend to be friendly, affectionate, and social, often greeting their owners and strangers alike with a wagging tail and a big smile. No matter what word you use, a tailwagger is sure to brighten your day with their infectious enthusiasm.