Page 1: orange, one, on, OR, op, over, os, out, office, own, once, ow, ox, om, old, off, open, oy, ore, of, OD, ope, owl, ONI, oven, other, oe, ola, oil, oxygen, ocean, oreo, oat, oink, organ, olive, ology, ordinary, obama, onion, OH, oi, only, often, October, oak, octopus, order, Oscar, and oud
| Word | Length | Vowels | Syllables | |||
|---|---|---|---|---|---|---|
| Orange | 6 | 3 | 3 | 3 | Middle English | |
| One | 3 | 1 | 2 | 1 | Middle English | |
| On | 2 | 1 | 1 | 1 | Middle English | |
| OR | 2 | 1 | 1 | 1 | ||
| Op | 2 | 1 | 1 | 1 | Dutch | |
| Over | 4 | 2 | 2 | 2 | Old English | |
| Os | 2 | 1 | 1 | 1 | Latin | |
| Out | 3 | 1 | 2 | 1 | Old English | |
| Office | 6 | 3 | 3 | 2 | Anglo Norman | |
| Own | 3 | 2 | 1 | 1 | Middle English | |
| Once | 4 | 2 | 2 | 1 | Middle English | |
| Ow | 2 | 1 | 1 | 1 | ||
| Ox | 2 | 1 | 1 | 1 | Old English | |
| Om | 2 | 1 | 1 | 1 | Sanskrit | |
| Old | 3 | 2 | 1 | 1 | Middle English | |
| Off | 3 | 2 | 1 | 1 | ||
| Open | 4 | 2 | 2 | 2 | Middle English | |
| Oy | 2 | 1 | 1 | 1 | Yiddish | |
| Ore | 3 | 1 | 2 | 2 | Middle English | |
| Of | 2 | 1 | 1 | 1 | Middle English | |
| OD | 2 | 1 | 1 | 1 | ||
| Ope | 3 | 1 | 2 | 2 | ||
| Owl | 3 | 2 | 1 | 1 | Middle English | |
| ONI | 3 | 1 | 2 | 2 | ||
| Oven | 4 | 2 | 2 | 2 | Middle English | |
| Other | 5 | 3 | 2 | 2 | Middle English | |
| Oe | 2 | 0 | 2 | 1 | Danish | |
| Ola | 3 | 1 | 2 | 2 | Old Irish | |
| Oil | 3 | 1 | 2 | 1 | Middle English | |
| Oxygen | 6 | 4 | 2 | 3 | French | |
| Ocean | 5 | 2 | 3 | 2 | Old French | |
| Oreo | 4 | 1 | 3 | 2 | Latin | |
| Oat | 3 | 1 | 2 | 1 | Middle English | |
| Oink | 4 | 2 | 2 | 1 | ||
| Organ | 5 | 3 | 2 | 2 | Latin | |
| Olive | 5 | 2 | 3 | 2 | Old French | |
| Ology | 5 | 3 | 2 | 3 | ||
| Ordinary | 8 | 5 | 3 | 4 | Anglo Norman | |
| Obama | 5 | 2 | 3 | 3 | ||
| Onion | 5 | 2 | 3 | 2 | Middle English | |
| OH | 2 | 1 | 1 | 1 | ||
| Oi | 2 | 0 | 2 | 1 | ||
| Only | 4 | 3 | 1 | 2 | Old English | |
| Often | 5 | 3 | 2 | 2 | Old English | |
| October | 7 | 4 | 3 | 3 | Middle English | |
| Oak | 3 | 1 | 2 | 1 | Middle English | |
| Octopus | 7 | 4 | 3 | 3 | Ancient Greek | |
| Order | 5 | 3 | 2 | 2 | Middle English | |
| Oscar | 5 | 3 | 2 | 2 | Irish | |
| Oud | 3 | 1 | 2 | 1 | Arabic |
Prefix: o-. List of words that begin like o / start with o.

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