casinovscésioWhich spelling fits?

Which to use

“casino” and “césio” are a confusable Portuguese pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#11,598
“casino” frequency rank
#41,427
“césio” frequency rank
53025
confusion score

Side-by-Side Comparison

Feature casino césio
Definition o mesmo que cassino ("casa", "jogo") 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 casino and césio

Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. casino runs 6 letters (CVCVCV) against césio's 5 (CVCVV) - the length gap alone is often enough to separate them once you know to check it.

6 ch
casino
5 ch
césio

Visual trap between casino and césio

A purely visual mix-up. casino (/kɐ.ˈzi.nu/) 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 differ by 1 letter(s) in length. Our composite confusion score for this pair is 53025, derived from the frequency rank of both members and their visual similarity.

casino is recorded at frequency rank #11,598, classified as anoun, pronounced /kɐ.ˈzi.nu/. 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 53025, this pair ranks #12,330 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of casino vs césio

Shared letters: cios. Private to "casino": an. Private to "césio": é.

"casino" · 6 letters · shape CVCVCV  ·  "césio" · 5 letters · shape CVCVV

Known mistypes of this pair

  • casino ← acsino · caisno · casinno · casion · casnio · cassino · ccasino · csaino

Frequently Asked Questions

Can "casino" and "césio" be used interchangeably?
No. They are said differently (/kɐ.ˈzi.nu/ versus /ˈsɛzju/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
In ordinary Portuguese text, does "casino" or "césio" show up more?
"casino" is the more common of the two: it sits at frequency rank #11,598 in our Portuguese list, against #41,427 for "césio". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Eye-level mix-up between "casino" and "césio" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "casino" 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 #12,330 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "casino" 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 #12,330 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list