13-Letter Nouns Starting With O
Here's the list of all the 260 13-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) | |
|---|---|
| ophthalmology | 1. the branch of medicine concerned with the eye and its diseases More Definitions → |
| orchestration | 1. an arrangement of a piece of music for performance by an orchestra or band 2. the act of arranging a piece of music for an orchestra and assigning parts to the different musical instruments More Definitions → |
| ornamentation | 1. the state of being ornamented 2. something used to beautify More Definitions → |
| osteomyelitis | 1. an inflammation of bone and bone marrow (usually caused by bacterial infection) More Definitions → |
| orthogonality | 1. the relation of opposition between things at right angles 2. the quality of lying or intersecting at right angles More Definitions → |
| More Common Nouns → | |