You'll be reading tons of new books at school, many of them challenging, and sometimes you'll need help understanding some of the big words being tossed around. Dictionary.com's app for iOS, Android, Windows Phone, Blackberry, Kindle Fire and Nook makes that task easier with voice activated search. Word enthusiasts will appreciate the trending words feature, the Hot Word blog and Word of the Day updates. You can even see what words were searched near you to spy on what your classmates are looking up. An update in the iOS 7 version lets you backup your favorites to iCloud so you won't lose your choice big words.