oil
/ɔɪl/
"oil" is a 3-letter English headword indexed on PlainSpell.
The verdict
“oil” is in the everyday core of English, ranked #834 in English word frequency and used as a noun.
- #834
- frequency rank, English
- 3
- letters
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Liquid fat.
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 | oil |
| Language | English |
| Part of speech | Noun |
| IPA | /ɔɪl/ |
| Letters | 3 |
| Frequency rank | #834 |
| Misspellings tracked | 0 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Where “oil” sits in English frequency
Spelling & Dictionary Insight
The English entry for oil is 3 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /ɔɪl/. Corpus data places it at rank #834 in overall English word frequency, putting it firmly in the everyday core of the language. Wiktionary records 5 distinct senses for this headword, so context determines which meaning a reader should apply.
We couldn't generate a plausible misspelling set for oil, a straightforward case of a spelling with little room for common typos. It also participates in 20 confusable-pair relationships, "on", "or", "OK", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.
Etymologically, the entry records: From Middle English oyle, oile (“olive oil”), borrowed from Anglo-Norman olie, from Latin oleum (“oil, olive oil”), from Ancient Greek ἔλαιον (élaion, “olive oil”), from ἐλαία (elaía, “olive”). Compare Proto-Slavic *lojь. More at olive. Doublet of oleum. Su… The correct English form is oil, spelled O-I-L.
Definition
- 1Liquid fat.
- 2Petroleum-based liquid used as fuel or lubricant.
- 3Petroleum.
- 4An oil painting.
- 5Oil paint.
Etymology
From Middle English oyle, oile (“olive oil”), borrowed from Anglo-Norman olie, from Latin oleum (“oil, olive oil”), from Ancient Greek ἔλαιον (élaion, “olive oil”), from ἐλαία (elaía, “olive”). Compare Proto-Slavic *lojь. More at olive. Doublet of oleum. Supplanted Middle English ele (“oil”), from Old English ele (“oil”), also from Latin.
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 “oil”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is O-I-L - every other letter order is a misspelling in standard orthography.
- Say it as /ɔɪl/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “on” - see the side-by-side comparison. oil vs on
- 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.