Which to use
“casco” and “césio” are a confusable Portuguese pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #14,093
- “casco” frequency rank
- #41,427
- “césio” frequency rank
- 55520
- confusion score
Side-by-Side Comparison
| Feature | casco | césio |
|---|---|---|
| Definition | invólucro do crânio | elemento químico de símbolo Cs, possui o número atômico 55 e massa atômica relativa 132,905 u; é um metal alcalino, de coloração ouro prateado; é encontrado em minerais de potássio, tais como micas, berílio, feldspatos e a polucita (alumínio-silicato de césio); o césio metálico é utilizado na fabricação de células fotoelétricas e detectores de infravermelho |
Where the eye mixes casco and césio
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Why the eye confuses casco with césio
A purely visual mix-up. casco (/ˈkaʃ.ku/) and césio (/ˈsɛzju/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 55520, derived from the frequency rank of both members and their visual similarity.
casco is recorded at frequency rank #14,093, classified as anoun, pronounced /ˈkaʃ.ku/. césio is at rank #41,427, tagged as anoun, pronounced /ˈsɛzju/.
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 55520, this pair ranks #10,546 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.
Orthographic DNA of casco vs césio
Shared letters: cos. Private to "casco": a. Private to "césio": ié.
"casco" · 5 letters · shape CVCCV · "césio" · 5 letters · shape CVCVV
Known mistypes of this pair
- casco ← acsco · cacso · cascco · casoc · cassco · ccasco · csaco
Frequently Asked Questions
Is swapping "casco" for "césio" ever safe?
Frequency check: "casco" vs "césio" - which ranks higher?
After this comparison
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "casco" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "césio" - compare definitions side by side with the headword page. Word entry
- This pair ranks #10,546 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "casco" and "césio" also get mixed up with nearby pairs, the highest-scored neighbour is "césio vs cisto". 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 #10,546 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.