iOS
"ios" is a 3-letter English headword indexed on PlainSpell.
The verdict
“iOS” sits in 20 confusable pairs (corpus #5,888) as a proper noun. The look-alike neighbours are the real trap.
- #5,888
- frequency rank, English
- 2,140
- “I” headwords
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A mobile operating system (OS) created and developed by Apple Inc. exclusively for its hardware.
Corpus desk
Index EN-ios · iOS · English
iOS · rank #5,888 · 0 variants · 20 confusables
- FREQ-COMMON #5,888
- LEN-MID 3 letters
- VOW-2 2 vowels
- CONFUS-HIGH 20 pairs
- VAR-0 0 variants
- BOOK-MID 2,140
- PHOTO-FINISH interface
Nearest frequency peer: interface (-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 “iOS”
Lower corpus rank = more everyday usage (inverted bar length for readability)
- ham
ham
94,116 corpus weight
- heal
heal
94,115 corpus weight
- interface
interface
94,114 corpus weight
- iOS
iOS
94,113 corpus weight
- jewelry
jewelry
94,112 corpus weight
- journalism
journalism
94,111 corpus weight
What this shows Bars show where “iOS” 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 | iOS |
| Language | English |
| Part of speech | Proper noun |
| Letters | 3 |
| Frequency rank | #5,888 |
| Misspellings tracked | 0 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Where “iOS” sits in English frequency
Easy to mix with look-alikes
The spelling risk for iOS is neighbouring look-alikes ("is", "it", …), not just typos; it is aproper noun. Frequency #5,888 among 2,140 “I” headwords. Gloss: "A mobile operating system (OS) created and developed by Apple Inc. exclusively for its hardware.".
Our edit-distance generator produced no likely misspellings for iOS, and the word's spelling is regular enough that our generator found nothing worth flagging. It also participates in 20 confusable-pair relationships, "is", "it", "IV", and more, where similar look or sound leads writers to substitute one word for another in context.
Etymologically, the entry records: From i- + OS. Many Apple products have an i- prefix in their names. The correct English form is iOS, spelled I-O-S.
Definition
- 1A mobile operating system (OS) created and developed by Apple Inc. exclusively for its hardware.
Recorded use
Wiktionary exampleThese source excerpts show how iOS appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
Not all of my vibecoding experiments have been successful. I've been struggling for weeks to build an "inbox autopilot" tool capable of responding to my emails automatically, in my writing style. I've encountered roadblocks when trying to integrate A.I. work flows into apps like Google Photos and iOS Voice Memos, which aren't designed to play well with th…
Etymology
From i- + OS. Many Apple products have an i- prefix in their names.
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 3, 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 "iOS", not the corpus desk frequency band.
What to do next
You've looked up "iOS". Here's where to go from here.
- "iOS" maps to 20 confusable pairs in this vintage; the highest-scored is "is". View pair
- Usage frequency rank #5,888 among English headwords in this corpus. Corpus statistics
- Browse more English words in the "I" letter cohort. I–Z browse
- PlainSpell rotates a curated Word of the Day from the English corpus, a passive way to discover vocabulary. Word of the Day
PlainSpell is a reference corpus, not spelling advice. Verify unusual forms in context.
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.