IonsvsiOSWhich spelling fits?

Which to use

“Ions” and “iOS” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#14,573
“Ions” frequency rank
#5,888
“iOS” frequency rank
20461
confusion score

Side-by-Side Comparison

Feature Ions iOS
Definition A surname originating as a patronymic. A mobile operating system (OS) created and developed by Apple Inc. exclusively for its hardware.

Letter map: Ions vs iOS

Shared letters muted; letters that set Ions and iOS apart highlighted. Shared run: 3.

4 ch
Ions
3 ch
iOS

Pair insight - Ions / iOS

Ions and iOS are indexed as a confusable English pair. We have no recorded pronunciation or part of speech for both members, so the spelling overlap is what we can show you: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 20461, derived from the frequency rank of both members and their visual similarity.

Ions is recorded at frequency rank #14,573, classified as aname. 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 20461, this pair ranks #430,928 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of Ions vs iOS

Shared letters: ios. Private to "Ions": n. Private to "iOS": -.

"Ions" · 4 letters · shape VVCC  ·  "iOS" · 3 letters · shape VVC

Known mistypes of this pair

  • Ionsinos · ionns · ionss · iosn · oins

Frequently Asked Questions

Is swapping "Ions" for "iOS" ever safe?
No. They differ by 1 letter(s) in length, but the dictionary glosses above give them different meanings, so swapping one for the other changes what the sentence says.
Frequency check: "Ions" 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 #14,573 for "Ions". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

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

  • Full dictionary entry for "Ions" 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 #430,928 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "Ions" and "iOS" also get mixed up with nearby pairs, the highest-scored neighbour is "ices vs Ions". Nearby pair
  • Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes

Confusion rank #430,928 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