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Is it Optimization or Optimisation?

Updated on March 7, 2014


I have been building websites for some time now and I have learned all about Search engine optimization (SEO). At the very beginning of learning about SEO, I kept running into articles that spoke about Search Engine Optimization but their spelling was a bit different. It was spelled Optimisation, with a S instead of a Z. I really started to frown upon this due to the fact that they weren't even spelling the word correctly. How can they attempt to teach others about SEO?

What is Optimization/Optimisation?

At first I didn't even think about checking into the spelling of the word to see which one was correct because the spelling seemed totally obvious to me. Optimization- [op-tuh-muh-zey-shuhn]. A couple years later, I started to doubt my own spelling and SEO knowledge so I researched the definitions of both spellings. I researched "what is optimization?" and found this definition: 1. The fact of Optimizing; making the best of anything. 2. "The condition of being optimized." I then searched for the word with a different spelling: Optimisation- Synonym for optimization. So basically, Optimisation is not necessarily incorrect. However, if you are typing the word in an article the spell checker automatically adds the red line underneath the word Optimisation and not Optimization. Why is this? Both of them mean the same, why does everyone think they are mispelled?

The word is spelled in two different ways.

Research has shown that British English and American English some times spell the same word in two different ways. British English spells Optimisation with an S and American English would spell Optimization with a Z. Another example of spelling the same word differently would be the word color. British English spells it Colour and American English spells it Color. So the spelling of certain words depend on which part of the world you are from. Another example of this is the word recognize and recognise.

All comments and samples are welcome below.


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    • tammyfrost profile imageAUTHOR

      Tammy Frost 

      6 years ago from Oregon

      The Spell Checker really makes me wonder sometimes lol. I am glad you liked my hub. Thanks for reading and commenting.

    • debbie roberts profile image

      Debbie Roberts 

      6 years ago from Greece

      I write my hubs from two different computers, ones spell checker is English spelling and the other is American, for some reason I can't change the American version to English on my Asus notepad, so I end up with squiggles all over my work when it is in edit mode. I have got used to it now!!

      An interesting hub for people who don't realize that different English speaking countries quite often spell the same word in a different way.Thank you for sharing....

    • alocsin profile image


      6 years ago from Orange County, CA

      I always though they were just British and American variants. Thanks for clarifying. Voting this Up and Beautiful.

    • Rain Defence profile image

      Rain Defence 

      6 years ago from UK

      My username contains one such word..

    • NetBlots profile image


      6 years ago from Melbourne

      I always went off what Google Chrome corrected me to =)

      Always the Z haha.

      But its just like honour or honor, the US and AUS spell it completely differently.

    • ChristinS profile image

      Christin Sander 

      6 years ago from Midwest

      many words are spelled differently in different countries - glad you discovered that before you discounted the other articles outright ;) Hopefully this helps others who also didn't realize the "z" and "s" interchangeability :) voted up and useful


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