oak
/əʊk/
"oak" is a 3-letter English headword indexed on PlainSpell.
The verdict
“oak” is a regularly-used English word, ranked #5,343 in English word frequency and used as a noun.
- #5,343
- frequency rank, English
- 3
- letters
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A deciduous tree with distinctive deeply lobed leaves, acorns, and notably strong wood, typically of England and northeastern North America, included in genus Quercus.
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | oak |
| Language | English |
| Part of speech | Noun |
| IPA | /əʊk/ |
| Letters | 3 |
| Frequency rank | #5,343 |
| Misspellings tracked | 0 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Where “oak” sits in English frequency
Spelling & Dictionary Insight
The English entry for oak is 3 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /əʊk/. Corpus data places it at rank #5,343 in overall English word frequency, indicating it appears regularly in written and spoken text. Wiktionary records 11 distinct senses for this headword, so context determines which meaning a reader should apply.
Zero misspellings are on record for oak in our index, and the word's spelling is regular enough that our generator found nothing worth flagging. It also participates in 20 confusable-pair relationships, "of", "on", "or", and more, where similar look or sound leads writers to substitute one word for another in context.
Etymologically, the entry records: Inherited from Middle English ake, hok, oek, ok, oke, from Old English aac, āc, ǣċ, from Proto-West Germanic *aik, from Proto-Germanic *aiks (“oak”), from Proto-Indo-European *h₂eyǵ- (“oak”). Cognates From Proto-Germanic: Scots aik, ake, yik (“oak”), North … The correct English form is oak, spelled O-A-K.
Definition
- 1A deciduous tree with distinctive deeply lobed leaves, acorns, and notably strong wood, typically of England and northeastern North America, included in genus Quercus.
- 2The wood of the oak.
- 3A rich brown color, like that of oak wood.
- 4Any tree of the genus Quercus, in family Fagaceae.
- 5Any tree of other genera and species of trees resembling typical oaks of genus Quercus in some ways.
- 6Any tree of other genera and species of trees resembling typical oaks of genus Quercus in some ways.
- 7Any tree of other genera and species of trees resembling typical oaks of genus Quercus in some ways.
- 8Any tree of other genera and species of trees resembling typical oaks of genus Quercus in some ways.
- 9Any tree of other genera and species of trees resembling typical oaks of genus Quercus in some ways.
- 10The outer (lockable) door of a set of rooms in a college or similar institution. (Often in the phrase sport one's oak.)
- 11The flavor of oak.
Etymology
Inherited from Middle English ake, hok, oek, ok, oke, from Old English aac, āc, ǣċ, from Proto-West Germanic *aik, from Proto-Germanic *aiks (“oak”), from Proto-Indo-European *h₂eyǵ- (“oak”). Cognates From Proto-Germanic: Scots aik, ake, yik (“oak”), North Frisian iake, iik (“oak”), Saterland Frisian Eeke (“oak”), West Frisian iik (“oak”), Cimbrian aicha, oach (“oak”), Dutch eik (“oak”), German Eiche (“oak”), Luxembourgish Eech (“oak”), Vilamovian aach, aeh́, ǡh́ (“oak”), Danish eg (“oak”), Faroese, Icelandic, and Norwegian Nynorsk eik (“oak”), Norwegian Bokmål eik, ek (“oak”), Swedish ek (“oak”). From Proto-Indo-European: Latin aesculus (“Italian oak”), Ancient Greek αἰγίλωψ (aigílōps, “Turkey oak”), Albanian enjë (“English yew; stinking juniper”), Latvian ozols (“oak”), Lithuanian ąžuolas (“oak”).
This word in other languages
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
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Using “oak”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is O-A-K - every other letter order is a misspelling in standard orthography.
- Say it as /əʊk/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “of” - see the side-by-side comparison. oak vs of
- Browse more English words and confusable pairs in the same reference. English words
Data Source
Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.