Dual, replicas, clones, facsimiles, twins ... there are so many words that mean "double." From small, commonplace words like "add" and "all" to huge, asthma-inducing monsters such as "lipopolysaccharide" and "immunofluorescence," these pesky double letters are alive and well, found in even the most unsuspecting syllables. With estimates that there are as many as 470,000 words in the English language, it's no wonder that so many words have a pair of twins. They're also the cause of many failed spelling tests and countless squiggly lines in Microsoft Word, but that's a discussion for another day.
Regardless of how you feel about them, it's always a good idea to bolster your vocabulary, and this quiz is full of definitions aching for a word or words aching for a definition. And to get you ready, here's a sentence only containing double letters: "All successful quizzes need accomplished, exceptionally affirmative intellectuals." We have no doubt that you are, in fact, a successful, exceptionally affirmative intellectual, and you'll be doing twice the celebrating when you're done.
Fun fact: This blurb contains sixteen cases of double letters, not including this sentence and the already identified words. Do you think you can find them? (Hint: repeated words and contractions count.)