The word tailwaggers is often used to refer to dogs - specifically, those whose tails wag when they are happy or excited. There are a number of synonyms for this term, including waggers, tail-thumpers, tail-waggers, and tail-wavers. Other possible synonyms might include happy hounds, cheerful canines, or jubilant pooches. Ultimately, the choice of synonym will depend on the context and tone of the writing - some terms, like waggers or tail-thumpers, might be more lighthearted and playful, while others, like happy hounds or jubilant pooches, might be more serious or formal. Regardless of the preferred synonym, however, it's clear that tailwaggers are beloved companions to many people around the world.