Why Do Brits and Americans Spell Words Differently?

President Barack Obama and First Lady Michelle Obama are greeted by Britain's Queen Elizabeth at Buckingham Palace in London, April 1, 2009. The White House / Pete Souza
President Barack Obama and First Lady Michelle Obama are greeted by Britain's Queen Elizabeth at Buckingham Palace in London, April 1, 2009.
(Image credit: The White House | Pete Souza)

Two people, one common language… sort of. Center vs. centre, color vs. colour, realize vs. realise — a seemingly endless list of spelling divergences have cropped up in the 250 years since the colonies and United Kingdom were ruled by one and the same king. Why are there so many differences in British and American spelling, and how did they creep in?

Each word has its own unique history, but the primary mover and shaker in this transatlantic drama is the nineteenth century American lexicographer Noah Webster, he of dictionary fame. According to "A History of English Spelling" (Manchester University, 2011) by D.G. Scragg, Webster's dictionary of 1828 is largely responsible for standardizing the accepted spelling of American English.

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Natalie Wolchover

Natalie Wolchover was a staff writer for Live Science from 2010 to 2012 and is currently a senior physics writer and editor for Quanta Magazine. She holds a bachelor's degree in physics from Tufts University and has studied physics at the University of California, Berkeley. Along with the staff of Quanta, Wolchover won the 2022 Pulitzer Prize for explanatory writing for her work on the building of the James Webb Space Telescope. Her work has also appeared in the The Best American Science and Nature Writing and The Best Writing on Mathematics, Nature, The New Yorker and Popular Science. She was the 2016 winner of the  Evert Clark/Seth Payne Award, an annual prize for young science journalists, as well as the winner of the 2017 Science Communication Award for the American Institute of Physics.