CésarvscésioWhat's the difference?

Which to use

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

#4,218
“César” frequency rank
#41,427
“césio” frequency rank
45645
confusion score

Side-by-Side Comparison

Feature César césio
Definition prenome masculino 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 César and césio

Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.

5 ch
César
5 ch
césio

Why the eye confuses César with césio

A purely visual mix-up. César (/'sɛ.zaɾ/) 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 45645, derived from the frequency rank of both members and their visual similarity.

César is recorded at frequency rank #4,218, classified as anoun, pronounced /'sɛ.zaɾ/. 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 45645, this pair ranks #19,744 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of César vs césio

Shared letters: csé. Private to "César": ar. Private to "césio": io.

"César" · 5 letters · shape CVCVC  ·  "césio" · 5 letters · shape CVCVV

Frequently Asked Questions

Do "César" and "césio" mean the same thing in a sentence?
No. They are said differently (/'sɛ.zaɾ/ versus /ˈsɛzju/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Which is more common, "César" or "césio"?
"César" is the more common of the two: it sits at frequency rank #4,218 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 "César" and "césio" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "César" 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 #19,744 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "César" and "césio" also get mixed up with nearby pairs, the highest-scored neighbour is "césio vs cisto". Nearby pair

Confusion rank #19,744 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