Put ye olde Merriam-Webster in your pocket and never bust a malaprop again. Find definitions, etymology, synonyms, and antonyms. Unsure how to spell the word in the first place? Use voice search. Can't pronounce it? Listen to the audio clip.
WIRED Offers a Word of the Day in-app. You can review words you looked up and promptly forgot. Provides full-screen entries in the phone apps.
TIRED Doesn't give suggestions for misspelled queries.