Which to use
“iso” is a noun and “iu” is a pronoun - they look or sound alike but fill different roles in a sentence.
- #12,181
- “iso” frequency rank
- #46,833
- “iu” frequency rank
- 59014
- confusion score
Side-by-Side Comparison
| Feature | iso | iu |
|---|---|---|
| Definition | Plan isométrique. | Je. |
Where the spellings diverge
Shared letters are muted; the letters that actually set iso and iu apart are highlighted. They share 1 letter in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
These two trip readers on the page rather than in the ear: iso is \i.zo\ while iu is \ˈiu\. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (noun vs pronoun), which is usually the fastest check. Our composite confusion score for this pair is 59014, derived from the frequency rank of both members and their visual similarity.
iso is recorded at frequency rank #12,181, classified as anoun, pronounced \i.zo\. iu is at rank #46,833, tagged as apron, pronounced \ˈiu\.
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 59014, this pair ranks #105,574 of 440,172 scored French confusable pairs - among the most confusable pairs.
Orthographic DNA of iso vs iu
Shared letters: i. Private to "iso": os. Private to "iu": u.
"iso" · 3 letters · shape VCV · "iu" · 2 letters · shape VV
Frequency comparison
Frequently Asked Questions
Can "iso" and "iu" be used interchangeably?
Which is more common, "iso" or "iu"?
Remembering iso vs iu
The fastest way to pick the right one every time.
- Check the role first: if you need a noun, it's “iso”; for a pronoun, it's “iu”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “iso” entry
- Browse more pairs most likely to be confused. Most confusable