ISAF
/ˈaisæf/
"isaf" is a 4-letter English headword indexed on PlainSpell.
The verdict
“ISAF” is uncommon English (frequency #50,603 among 17,902 “I” headwords), classed as a proper noun. The kind of spelling people second-guess.
- #50,603
- frequency rank, English
- 17,902
- “I” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Acronym of International Sailing Federation (world governing body for the sport of sailing).
| Property | Value |
|---|---|
| Headword | ISAF |
| Language | English |
| Part of speech | Proper noun |
| IPA | /ˈaisæf/ |
| Letters | 4 |
| Frequency rank | #50,603 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “ISAF” sits in English frequency
Rare enough to double-check
ISAF is uncommon English at frequency #50,603 among 17,902 “I” headwords, classed as aproper noun, transcribed /ˈaisæf/. Rarity is why readers land here mid-draft. 4 senses are on record.
We couldn't generate a plausible misspelling set for ISAF, a straightforward case of a spelling with little room for common typos. No close-neighbour confusable shows up for this headword in our dataset, a sign it's visually distinctive enough not to be mixed up with another word.
No explicit etymology string is stored for this entry, so its spelling is easiest to reason about phoneme by phoneme, absent a documented history. The correct English form is ISAF, spelled I-S-A-F.
Definition
- 1Acronym of International Sailing Federation (world governing body for the sport of sailing).
- 2Acronym of International Security Assistance Force (NATO-led mission in Afghanistan which was established on 20 December 2001).
- 3Acronym of International Security Assistance Force (NATO-led mission in Afghanistan which was established on 20 December 2001).
- 4International Shark Attack File (global database of shark attacks)
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 “ISAF”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is I-S-A-F - every other letter order is a misspelling in standard orthography.
- Say it as /ˈaisæf/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Browse more English words and confusable pairs in the same reference. English words
Other uncommon English words near this 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.