OAS
"oas" is a 3-letter English headword indexed on PlainSpell.
The verdict
“OAS” sits in 20 confusable pairs (corpus #44,377) as a proper noun. The look-alike neighbours are the real trap.
- #44,377
- frequency rank, English
- 1,431
- “O” headwords
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed September 2, 2026) - Initialism of Organization of American States.
Corpus desk
Index EN-oas · OAS · English
OAS · rank #44,377 · 0 variants · 20 confusables
- FREQ-MID #44,377
- LEN-MID 3 letters
- VOW-2 2 vowels
- CONFUS-HIGH 20 pairs
- VAR-0 0 variants
- BOOK-MID 1,431
- PHOTO-FINISH Oberon
Nearest frequency peer: Oberon (+1 rank slots)
Read with this headword: Spelling guide for this pattern
Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.
Frequency neighbourhood for “OAS”
Lower corpus rank = more everyday usage (inverted bar length for readability)
- nob
nob
55,628 corpus weight
- nother
nother
55,627 corpus weight
- OAS
OAS
55,624 corpus weight
- Oberon
Oberon
55,623 corpus weight
- octagonal
octagonal
55,621 corpus weight
- Ofcom
Ofcom
55,620 corpus weight
What this shows Bars show where “OAS” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.
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
Easy to mix with look-alikes
The spelling risk for OAS is neighbouring look-alikes ("of", "on", …), not just typos; it is aproper noun. Frequency #44,377 among 1,431 “O” headwords. 4 recorded senses keep meaning in play.
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.
Recorded use
Wiktionary exampleThese source excerpts show how OAS appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
The first real meeting of the OAS was held in mid-May 1961. Its purpose was to sabotage de Gaulle’s efforts to remove French rule from Algeria.
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.
PlainSpell is rendered directly from structured Wiktionary extracts and open word-frequency lists, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of September 2, 2026. Primary sources: Wiktionary (via kaikki.org) and FrequencyWords.
Frequently Asked Questions
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "OAS", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 3 letters (nearest by frequency rank).
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.