Tail away is a phrase that means to gradually decrease or fade away. There are many synonyms that can be used to describe this action. For example, dwindle, diminish, subside, fade out, taper off, die down, and peter out. Each of these synonyms has a slightly different connotation, but they all convey the idea of something gradually lessening or fading. Using a variety of synonyms for tail away can help add variety to your writing and make it more interesting to read. Whether you are writing a novel, an essay, or a blog post, incorporating these different synonyms will keep your readers engaged and interested.