innvsiOSWhich spelling fits?

Quick tell: inn is a noun, iOS is a name, so they fill different roles in a sentence.

Which to use

“inn” is a noun and “iOS” is a name - they look or sound alike but fill different roles in a sentence.

#6,369
“inn” frequency rank
#5,888
“iOS” frequency rank
12257
confusion score

Side-by-Side Comparison

Feature inn iOS
Definition Any establishment where travellers can procure lodging, food, and drink. A mobile operating system (OS) created and developed by Apple Inc. exclusively for its hardware.

Letter map: inn vs iOS

Shared letters muted; letters that set inn and iOS apart highlighted. Shared run: 1.

3 ch
inn
3 ch
iOS

Grammar separator: inn vs iOS

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: inn is anoun and iOSaname. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 12257, derived from the frequency rank of both members and their visual similarity.

inn is recorded at frequency rank #6,369, classified as anoun, pronounced /ɪn/. iOS is at rank #5,888, tagged as aname.

Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.

With a confusion score of 12257, this pair ranks #482,580 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of inn vs iOS

Shared letters: i. Private to "inn": n. Private to "iOS": os.

"inn" · 3 letters · shape VCC  ·  "iOS" · 3 letters · shape VVC

Frequently Asked Questions

Is swapping "inn" for "iOS" ever safe?
No - they are not even the same part of speech. "inn" is a noun and "iOS" a name, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "inn" vs "iOS" - which ranks higher?
"iOS" is the more common of the two: it sits at frequency rank #5,888 in our English list, against #6,369 for "inn". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Pair "inn" vs "iOS" is on the table, pick a follow-up below.

  • Full dictionary entry for "inn" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "iOS" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #482,580 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "inn" and "iOS" also get mixed up with nearby pairs, the highest-scored neighbour is "Ilan vs inn". Nearby pair

Confusion rank #482,580 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list