1 "12 Languages That Are Easy for English Speakers to Learn." Oxford Royale Academy. Accessed: April 25, 2018.
2 "14 of the Longest Words in English" Grammarly. July 16, 2017. Accessed: January 12, 2024
3 "Ambigram." Oxford Dictionary. Accessed: April 23, 2018.
4 "Blatteroon." World Wide Words. Accessed: December 11, 2018.
5 Bridgman, Andrew. "Study: 'Time' Is Most Often Used Noun." CBS News, June 22, 2006. Accessed: April 25, 2018.
6 "Callipygian." Merriam-Webster. Accessed: April 25, 2018.
7 "Check Mate." Online Etymology Dictionary. Accessed: December 9, 2018.
8 "Cul-de-sac." Merriam Webster. Accessed: September 16, 2018.
9 "Darkle." Merriam-Webster. Accessed: April 25, 2018.
10 'Duck." Online Etymology. Accessed: May 5, 2023.
11 "Embox." Merriam Webster. Accessed: November 16, 2018.
12 "Five English Words That Are Utterly Unique." Dictionary.com. Accessed: April 25, 2018.
13 "Good-bye." Online Etymology Dictionary. Accessed: April 25, 2018.
14 Gooden, Philip. The Story of English: How the English Language Conquered the World. London: Quercus, 2009.
15 "Haply I May Remember." Oysterhood.
16 Hickey, Walter. "One Map That Shows Why English Will Never Be the Official Language of the US." Business Insider, September 11, 2013. Accessed: April 26, 2018.
17 "Interesting Facts about Words." Grammar. Accessed: April 24, 2018.
18 "Is Ironic the Most Abused Word in English?" Dictionary. com. Accessed: April 25, 2018.
19 Johnson, Steven. "'Booty' Is The Funniest Word In The English Language, Study Says." Big Think. August 4, 2017. Accessed: July 13, 2019.
20 Lerer, Seth. Inventing the English Language. New York: Columbia University, 2007.
21 Lubin, Gus. "Here's the Full Definition of the Most Complex Word in the English Language." Business Insider. September 3, 2013. Accessed: April 25, 2018.
22 "Lynch." Online Etymological Dictionary. Accessed: July 13, 2019.
23 Millward, David. "English to Become Compulsory for Pilots." Telegraph, March 5, 2008. Accessed: April 23, 2018.
24 Nichol, Mark. "75 Contronyms (Words with Contradictory Meanings)." Daily Writing Tips. Accessed: April 26, 2018.
25 "No. of Words in the English Language." Global Language Monitor. Accessed: April 24, 2018.
26 "Nouns That Exist Only in the Singular or Plural Form." English Grammar. Accessed: April 23, 2021.
27 "Oldest English Words Identified." BBC News, February 26, 2009. Accessed: April 23, 2018.
28 "Overmorrow." Webster-Dictionary. Accessed: April 25, 2018.
29 "Pangram." Dictionary. Accessed: April 23, 2018.
30 "Poecilonym." Word a Day. Accessed: August 30, 2019.
31 "Rhinorrhea." Online Etymology Dictionary. Accessed: April 25, 2018.
32 R.L.G. "Vocabulary Size: Lexical Facts." Economist, May 29, 2013. Accessed: April 24, 2018.
33 Royce, Walker. Eureka!: Discover and Enjoy the Hidden Power of the English Language.
34 "Sofa." Online Etymology Dictionary. Accessed: April 24, 2022.
35 "The 15 Most Unusual Words You'll Find in the English Language." Cultures Connection. Accessed: January 19, 2022.
36 "The Oxford English Corpus." Oxford Dictionary. Accessed: April 24, 2018.
37 Varveri, Christina. "Six English Words Originated from an Extinct Language." UselessDaily. October 1, 2013. Accessed: April 25, 2018.
38 "Which Letters in the Alphabet are Used Most Often?" Oxford Dictionaries. Accessed: April 26, 2018.