Staff O of the Old English Wordbook.
For a full list of etymological and other abbreviations used in these wordlists, see: Forshortenings.
| Quickened | Old English | Kind | Meaning |
| o | ā | n | always |
| oad | ād (cf. OS ēd) | n | pile (especially for fire or funeral), funeral pyre |
| oal | āl | n | a fire, a flame |
| oar | ār | n | honor, grace, kindness, mercy |
| oathom | āþum | n | son-in-law, brother-in-law |
| oathstaff | āþstæf | n | oath, oath-making |
| offarm | ofearmian | vb | to pity |
| offgalth | æfgælþ | n | a superstition |
| oldbaken | ealdbacen | adj | stale |
| onalike | ongelīc | adj | similar |
| onalikeness | ongelīcness | n | a formula, a pattern |
| onblow | onblāwian | vb | to inspire |
| onbow | onbúgan | vb | to submit, yield to |
| onbright | onbyrhtan | vb | to illuminate |
| onburn | onbærnan | vb | to kindle, excute, inspire |
| onclive | onclifian | vb | to persist |
| ondeal | ondǣlan | vb | to infuse |
| ondy | andig | adj | envious, jealous, malicious, spiteful |
| onearth/oneard | oneardian | vb | to inhabit |
| ondfang | on(d)fōn | vb | to receive, accept |
| oneborn | ānboren | adj | only-begotten |
| oneganger | āngenga | n | lone traveller, lone-goer |
| onehend | ānhende | adj | one-handed, having one hand, lame, imperfect |
| onehorn | ānhorn | n | unicorn |
| oneleap | ānhlēap | adj | unmarried, single |
| onemood | ānmōd | adj | unanimous, of one mind |
| onenight | ānnihte | adj | one night old |
| oneread | ānrǣd | adj | agreed, resolute, unanimous, prompt, vehement |
| onewield | ānweald | n | an autocracy, a monocracy; dictatorship |
| onewye | ānwīg | n | a duel |
| onfind | onfindan | vb | to discover |
| onfly | onflyge | n | infectious disease |
| onkithe | oncȳðan | vb | to make known, reveal |
| onkithey | oncydig | adj | conscious |
| onmarking | onmearcung | n | inscription |
| onrease | onrǣs | n | onrush, assault, attack; violent motion |
| onstell | onstellan | vb | to institute, create, originate, establish, give the example of |
| onwryness | onwrignes | n | revelation, exposure |
| oom | ōm | n | rust |
| oose | ōs | n | a god of the Germanic pantheon |
| oost | ōst | n | tree knot |
| ore | ār | n | boder, messenger, angel, herald, envoy |
| ore | ārian | vb | to give honor, to honor; to regard, to have mercy, to treat mercifully |
| orefast | ārfæst | adj | honourable |
| oretship | orretscipe | n | infamy, disgrace |
| oreworthy | ārweorþig | adj | venerable |
| orlay | orlæg | n | fate, destiny |
| ormete | ormǣte | adj | immense, excessive, limitless, boundless |
| ormood | ormōd | adj | hopeless, despairing, without courage |
| ormoodness | ormōdness | n | desperation, despair |
| orped | orped | adj | stout-hearted, bold, valiant, strong in battle |
| orping | orpung | n | respiration |
| orth | orþ/oroþ | n | breath, breathing |
| orthank | orþanc | n | intelligence, skill, cunning |
| oster | ostre | n | oyster |
| oth | ōþ | pp/c | until, as far as, up to, down to |
| oth- | ōþ | pfx | usually gives meaning of outfare (departure) or toshedness (seperation) |
| othbear | ōþberan | vb | to bear away, carry off |
| othburst | ōþberstan | vb | to break away, escape |
| otheach | ōþécan | vb | to add to |
| othfast | ōþfæstan | vb | to inflict upon |
| othfare | ōþfaran | vb | to flee from, escape |
| othfall | ōþfeallan | vb | to decline |
| othquell | ōþcwelan | vb | to die |
| othshake | ōþsceacan | vb | to escape |
| othshoot | ōþscéotan | vb | to shoot away, escape, turn aside, hurry off |
| othstand | ōþstandan | vb | to stop in one's course, to remain standing, to cease |
| othstill | ōþstillan | vb | to put a stop to, to stop |
| othswear | ōþswerian | vb | to abjure, deny an oath |
| oththring | ōþþringan | vb | to deprive of |
| othwend | ōþwendan | vb | to divert |
| othwite | ōþwítan | vb | to blame, charge with |
| othwork | ōþwyrcan | vb | to harm (?) |
| ought | ōht | n | persecution |
| outcund | ūtacund | adj | foreign, alien, strange |
| outfare | ūtfaru | n | going out |
| outgang | ūtgang | n | egress, exit, evacuation |
| outh- | ūð- | pfx | intensifying prefix |
| outhwit | ūðwita | n | scholar, scribe, philosopher, specialist, expert |
| outhwit(ty)ing | ūðwitegung | n | philosophy |
| outwark | ūtwærc | n | dysentery |
| overbebid | oferbebédan | vb | to rule |
| overbecome | oferbecuman | vb | to supervene |
| overbreak | oferbrecan | vb | to transgress, violate |
| overeke | oferēaca | n | surplus, remainder; addition, augmentation |
| overfall | oferfeallan | vb | to fall upon, to attack |
| overfare | oferfaran | vb | to traverse |
| overfathom | oferfæðman | vb | to envelop |
| overfight | oferfeohtan | vb | to conquer |
| overfollow | oferfygan | vb | to pursue |
| overhew | oferhíwian | vb | to transfigure |
| overitimber | ofergetimbran | vb | to erect |
| overiwrit | ofergewrit | n | superscription, inscription |
| overlive | oferlibban | vb | to survive |
| overmood | ofermōd | n | pride, arrogance, overconfidence, hubris, insolence |
| overmoody | ofermōdig | adj | proud, arrogant, saucy, wanton |
| overnim | oferniman | vb | to take by violence, to violate, to take away, to carry off, to overtake |
| oversend | ofersendan | vb | to transmit |
| oversit | ofersittan | vb | to occupy, possess |
| overslay | ofersléan | vb | to subdue, to overcome |
| overspeech | ofersprǣc | n | excessive language, loquacity, exaggeration |
| oversty | oferstīgan | vb | to surmount, to surpass, to transcend, to exceed, to overcome |
| overswithe | oferswíðan | vb | to overcome, conquer, vanquish |
| overtale/overtell | ofertalian | vb | to convince |
| ovest | ōfost | n | speed, haste |
| ovestly | ōfostlīce | adv | speedily, hastily |
| owe | āge | n | property, possessions |
| ower | āga | n | owner, possessor |
| ownspeech | āgenspræc | n | an idiom, the peculiarity of a language |