12-Letter Words Starting With O

Here's the list of all the 731 12-Letter Words Starting With O in the English Language.

The list is arranged by the word lengths. Click on the length below to jump to the relevant section of the page.

Common Words (with Definitions and Examples)
organization
1. a group of people who work together
2. an organized structure for arranging or classifying
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organisation
1. the persons (or committees or departments etc.) who make up a body for the purpose of administering something
2. a group of people who work together
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optimization
1. the act of rendering optimal
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occupational
1. of or relating to the activity or business for which you are trained
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occasionally
1. sporadically and infrequently
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12-Letter Words Starting With O