OAS
"oas" is a 3-letter English headword indexed on PlainSpell.
The verdict
“OAS” is a moderately-common English word, ranked #44,377 in English word frequency and used as a proper noun.
- #44,377
- frequency rank, English
- 3
- letters
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Initialism of Organization of American States.
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 | OAS |
| Language | English |
| Part of speech | Proper noun |
| Letters | 3 |
| Frequency rank | #44,377 |
| Misspellings tracked | 0 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Where “OAS” sits in English frequency
Spelling & Dictionary Insight
The English entry for OAS is 3 letters long, classified as a proper noun. Corpus data places it at rank #44,377 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 4 distinct senses for this headword, so context determines which meaning a reader should apply.
Our edit-distance generator produced no likely misspellings for OAS, a straightforward case of a spelling with little room for common typos. It also participates in 20 confusable-pair relationships, "of", "on", "or", and more, since the words sound or look close enough that writers reach for the wrong one mid-sentence.
This entry's etymology isn't recorded, so its spelling pattern is best understood through pronunciation rather than a traceable origin. The correct English form is OAS, spelled O-A-S.
Definition
- 1Initialism of Organization of American States.
- 2Initialism of Old Age Security.
- 3Initialism of OpenAPI Specification, a specification for machine-readable interface files for describing, producing, consuming, and visualizing RESTful Web services.
- 4Initialism of Organisation de l’Armée Secrète, a French organization.
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 “OAS”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is O-A-S - every other letter order is a misspelling in standard orthography.
- Don't mix it up with “of” - see the side-by-side comparison. OAS 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.