islevsISOTell them apart

Which to use

“isle” and “ISO” are a confusable German pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#41,260
“isle” frequency rank
#8,887
“ISO” frequency rank
50147
confusion score

Side-by-Side Comparison

Feature isle ISO
Definition die Insel oder kleine Insel Internationale Organisation für Normung (International Organization for Standardization); Vereinigung von Normungsorganisationen, die internationale Normen erarbeitet

Where the eye mixes isle and ISO

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

4 ch
isle
3 ch
ISO

Why the eye confuses isle with ISO

A purely visual mix-up. isle ([aɪl]) and ISO ([iːsoː]) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 50147, derived from the frequency rank of both members and their visual similarity.

isle is recorded at frequency rank #41,260, classified as anoun, pronounced [aɪl]. ISO is at rank #8,887, tagged as anoun, pronounced [iːsoː].

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 50147, this pair ranks #1,184,850 of 2,006,359 scored German confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of isle vs ISO

Shared letters: is. Private to "isle": el. Private to "ISO": o.

"isle" · 4 letters · shape VCCV  ·  "ISO" · 3 letters · shape VCV

Known mistypes of this pair

  • isleisel · islle · issle · sile

Frequently Asked Questions

Do "isle" and "ISO" mean the same thing in a sentence?
No. They are said differently ([aɪl] versus [iːsoː]) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
In ordinary German text, does "isle" or "ISO" show up more?
"ISO" is the more common of the two: it sits at frequency rank #8,887 in our German list, against #41,260 for "isle". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

  • Full dictionary entry for "isle" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "ISO" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #1,184,850 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
  • "isle" and "ISO" also get mixed up with nearby pairs, the highest-scored neighbour is "ile vs isle". 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 #1,184,850 of 2,006,359 scored German pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list