Are you often left wondering whether to use healthy or healthful? Is that sugary treat a doughnut or a donut? Is data singular, plural, or both? Look no further for help than New York Times bestselling author Mignon Fogarty, aka Grammar Girl. Millions of fans around the world sound better thanks to Grammar Girl, and with this fourth book in the series of 101 Words books, she's here to make sure you're never stumped by another troublesome word again. Have an important job interview coming up? Preparing for a big speech or presentation? Just want to avoid the embarrassment of using addictive when you mean addicting? Grammar Girl has you covered with a wide range of words that often trip us up. Each entry features clear definitions and examples that put each word in context, along with the helpful memory tricks and fun, straight-forward style Grammar Girl is known for. Developing a strong, well-balanced vocabulary is an important skill that will help you throughout your life. With Grammar Girl's help you'll be writing better, holding your own in conversation, and standing out from the crowd in no time at all.