Which to use
“iris” is a noun and “IRS” is a name - they look or sound alike but fill different roles in a sentence.
- #10,228
- “iris” frequency rank
- #8,440
- “IRS” frequency rank
- 18668
- confusion score
Side-by-Side Comparison
| Feature | iris | IRS |
|---|---|---|
| Definition | A plant of the genus Iris, common in the northern hemisphere, and generally having attractive blooms (See Iris (plant) on Wikipedia.Wikipedia). | Initialism of Internal Revenue Service. |
Where the eye mixes iris and IRS
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Look-alike desk: iris vs IRS
These two trip readers on the page rather than in the ear: iris is /ˈaɪ.ɹɪs/ while IRS is /ˈaɪ.ɑɹ.ɛs/. 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 name), which is usually the fastest check. Our composite confusion score for this pair is 18668, derived from the frequency rank of both members and their visual similarity.
iris is recorded at frequency rank #10,228, classified as anoun, pronounced /ˈaɪ.ɹɪs/. IRS is at rank #8,440, tagged as aname, pronounced /ˈaɪ.ɑɹ.ɛs/.
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 18668, this pair ranks #443,320 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of iris vs IRS
Shared letters: irs. Private to "iris": -. Private to "IRS": -.
"iris" · 4 letters · shape VCVC · "IRS" · 3 letters · shape VCC
Known mistypes of this pair
- iris ← iirs · iriss · irris · irsi · riis
Frequently Asked Questions
Is swapping "iris" for "IRS" ever safe?
In ordinary English text, does "iris" or "IRS" show up more?
What to do next
Eye-level mix-up between "iris" and "IRS" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "iris" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "IRS" - compare definitions side by side with the headword page. Word entry
- This pair ranks #443,320 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "iris" and "IRS" also get mixed up with nearby pairs, the highest-scored neighbour is "iris vs Irv". 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 #443,320 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.