English Words: O

1,431 words · Page 13 of 29

oohintj

An expression of surprise.

Ooiname

A surname, most commonly found in Malaysia and Singapore.

ookintj

Used to represent the sound of the cry of an ape or monkey.

oolongnoun

A partially fermented tea, often roasted, which combines the characteristics of green tea and black tea.

oomnoun

An older man, especially an uncle. (Frequently as a respectful form of address.)

oomphnoun

Strength, power, passion or effectiveness; clout.

Oonaname

A female given name from Irish.

OOOadj

Abbreviation of out of office.

ooohnoun

Elongated form of ooh.

oooohintj

Elongated form of ooh.

OOPnoun

Initialism of object-oriented programming.

oopsintj

Acknowledging a mistake.

oopsieintj

Alternative spelling of oopsy.

Oortname

A surname from Dutch.

ootpron

anything

oozenoun

Tanning liquor, an aqueous extract of vegetable matter (tanbark, sumac, etc.) in a tanning vat used to tan leather.

oozingnoun

Something that oozes; a seepage.

opnoun

Clipping of opponent.

opanoun

Grandfather, grandpa.

opacitynoun

The state or quality of being opaque, not allowing light to pass through.

opalnoun

A mineral consisting, like quartz, of silica, but inferior to quartz in hardness and specific gravity, of the chemical formula SiO₂·nH₂O.

opalescentadj

Exhibiting a milky iridescence like that of an opal.

Opalsname

The women's national basketball representative team of Australia.

opaqueadj

Neither reflecting nor emitting light.

OPCnoun

Abbreviation of oligomeric proanthocyanidin.

OPDname

Initialism of Oakland Police Department.

OPECname

Acronym of Organization of Petroleum Exporting Countries.

Opelikaname

A city, the county seat of Lee County, Alabama, United States.

openadj

Physically unobstructed, uncovered, etc.

OpenBSDname

a Unix-like operating system that is derived from Berkeley Software Distribution (BSD)

opencastadj

Of or pertaining to strip mining, in which material is removed from a surface that has been exposed

openedverb

simple past and past participle of open

openernoun

A person who opens something.

openingverb

present participle and gerund of open

openlyadv

In an open manner; visibly.

opennessnoun

Accommodating attitude or opinion, as in receptivity to new ideas, behaviors, cultures, peoples, environments, experiences, etc., different from the familiar, conventional, traditional, or one's own.

opensnoun

plural of open

openSUSEname

A free and open-source Linux distribution.

opernoun

A network operator on IRC.

operanoun

A theatrical work, combining drama, music, song and sometimes dance.

operableadj

Able to be operated or used.

operandnoun

A quantity to which an operator is applied (in 3-x, the operands of the subtraction operator are 3 and x).

operantadj

That operates to produce an effect.

operateverb

To perform a work or labour; to exert power or strength, physical or mechanical; to act.

operatedverb

simple past and past participle of operate

operaticadj

Of, related to, or typical of opera.

operatingadj

In operation; that operates.

operationnoun

The method by which a device performs its function.

operationaladj

Of or relating to operations, especially military operations.

operationallyadv

In an operational manner; in accordance with an operation.

Spelling & Dictionary Insight

The English alphabetical index for the letter O contains 1,431 headwords drawn from our Wiktionary-derived dictionary table. At 50 entries per page the browse splits into 29 pages, and you are currently viewing page 13. Every row above is a dictionary-backed entry with a canonical slug, and each links through to a full definition page with pronunciation, senses, etymology, and related-word data where available.

On this page 50 of 50 entries carry a part-of-speech tag and 50 carry at least one stored definition. Coverage varies across letters because Wiktionary volunteers build entries at different speeds for different parts of the alphabet, letters with common starting sounds (S, C, T, P) usually have the densest coverage, while less frequent starters (X, Q, Z) tend to have shorter but more specialised lists. PlainSpell surfaces whatever data is present and links back to the source when a definition is not yet recorded.

For readers using this index as a spelling reference, the guarantee is that every form you see on the list is a documented English headword, not a guess, not a derived inflection lacking a lemma row. If a word you expected to find is absent from the "O" list, it usually means the form exists only as an inflection of another lemma (e.g. a past participle stored under the infinitive) or the entry has not yet been imported from Wiktionary. Use the search bar or the misspelling lookup to resolve these cases.