IAAF
"iaaf" is a 4-letter English headword indexed on PlainSpell.
The verdict
“IAAF” is uncommon English (frequency #51,761 among 17,902 “I” headwords), classed as a proper noun. The kind of spelling people second-guess.
- #51,761
- frequency rank, English
- 17,902
- “I” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Initialism of International Amateur Athletics Federation (1912–2001).
Corpus desk
Index EN-iaaf · IAAF · English
IAAF · rank #51,761 · 0 variants · 0 confusables
- FREQ-RARE #51,761
- LEN-MID 4 letters
- VOW-3 3 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-DENSE 17,902
- PHOTO-FINISH hypotension
Nearest frequency peer: hypotension (-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 “IAAF”
Lower corpus rank = more everyday usage (inverted bar length for readability)
- heterosexua…
heterosexuality
48,246 corpus weight
- heuristics
heuristics
48,245 corpus weight
- hydride
hydride
48,242 corpus weight
- hypotension
hypotension
48,241 corpus weight
- IAAF
IAAF
48,240 corpus weight
- IAP
IAP
48,239 corpus weight
What this shows Bars show where “IAAF” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.
| Property | Value |
|---|---|
| Headword | IAAF |
| Language | English |
| Part of speech | Proper noun |
| Letters | 4 |
| Frequency rank | #51,761 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “IAAF” sits in English frequency
Rare enough to double-check
IAAF is uncommon English at frequency #51,761 among 17,902 “I” headwords, classed as aproper noun. Rarity is why readers land here mid-draft. 2 senses are on record.
No generated misspelling entries exist for IAAF in our index, typically a sign the spelling maps closely to how the word sounds. Our dataset records no confusable match here, since nothing in our dataset looks or sounds close enough to cause mix-ups.
No documented word history exists for this headword, so spelling patterns must be inferred from the word's phoneme-to-grapheme mapping rather than from a documented borrowing chain. The correct English form is IAAF, spelled I-A-A-F.
Definition
- 1Initialism of International Amateur Athletics Federation (1912–2001).
- 2Initialism of International Association of Athletics Federations (2001–2019).
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 May 6, 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 "IAAF", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 4 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.