13-Letter Words Starting With O
Here's the list of all the 475 13-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) | |
|---|---|
| objectionable | 1. causing disapproval or protest 2. liable to objection or debate; used of something one might take exception to More Definitions → |
| ophthalmology | 1. the branch of medicine concerned with the eye and its diseases More Definitions → |
| observational | 1. relying on observation or experiment More Definitions → |
| opportunistic | 1. taking immediate advantage, often unethically, of any circumstance of possible benefit 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 → |
| More Common Words → | |