Which to use
“concussion” and “confusion” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #13,689
- “concussion” frequency rank
- #5,204
- “confusion” frequency rank
- 18893
- confusion score
Side-by-Side Comparison
| Feature | concussion | confusion |
|---|---|---|
| Definition | A violent collision or shock. | A lack of clarity or order. |
Where the eye mixes concussion and confusion
Muted = shared; highlighted = the visual trap. They share 8 letters in sequence. concussion runs 10 letters (CVCCVCCVVC) against confusion's 9 (CVCCVCVVC) - the length gap alone is often enough to separate them once you know to check it.
Look-alike desk: concussion vs confusion
A purely visual mix-up. concussion (/kənˈkʌʃən/) and confusion (/kənˈfjuːʒən/) 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 18893, derived from the frequency rank of both members and their visual similarity.
concussion is recorded at frequency rank #13,689, classified as anoun, pronounced /kənˈkʌʃən/. confusion is at rank #5,204, tagged as anoun, pronounced /kənˈfjuːʒən/.
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 18893, this pair ranks #441,894 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of concussion vs confusion
Shared letters: cinosu. Private to "concussion": -. Private to "confusion": f.
"concussion" · 10 letters · shape CVCCVCCVVC · "confusion" · 9 letters · shape CVCCVCVVC
Known mistypes of this pair
- concussion ← cconcussion · cnocussion · cocnussion · conccussion · concsusion · concusion · concusison · concussino
- confusion ← cconfusion · cnofusion · cofnusion · conffusion · confsuion · confuison · confusino · confusionn
Frequently Asked Questions
Is swapping "concussion" for "confusion" ever safe?
Frequency check: "concussion" vs "confusion" - which ranks higher?
Useful next steps
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "concussion" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "confusion" - compare definitions side by side with the headword page. Word entry
- This pair ranks #441,894 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "concussion" and "confusion" also get mixed up with nearby pairs, the highest-scored neighbour is "Confucian vs confusion". 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 #441,894 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.