12-Letter Nouns Starting With O

Here's the list of all the 388 12-Letter Nouns 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 Nouns (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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osteoporosis
1. abnormal loss of bony tissue resulting in fragile porous bones attributable to a lack of calcium; most common in postmenopausal women
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optimisation
1. the act of rendering optimal
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12-Letter Nouns Starting With O