Which to use
“ceia” is a noun and “cem” is a num - they look or sound alike but fill different roles in a sentence.
- #14,796
- “ceia” frequency rank
- #3,188
- “cem” frequency rank
- 17984
- confusion score
Side-by-Side Comparison
| Feature | ceia | cem |
|---|---|---|
| Definition | a última refeição do dia | número equivalente a dez dezenas; cardinalidade de um conjunto que contenha uma centena de elementos distintos; representado pelo símbolo 100 (algarismos arábicos) ou C (algarismos romanos) |
Where the eye mixes ceia and cem
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Why the eye confuses ceia with cem
These two trip readers on the page rather than in the ear: ceia is /ˈsɐj.ɐ/ while cem is /ˈsɐ̃j̃/. 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 num), which is usually the fastest check. Our composite confusion score for this pair is 17984, derived from the frequency rank of both members and their visual similarity.
ceia is recorded at frequency rank #14,796, classified as anoun, pronounced /ˈsɐj.ɐ/. cem is at rank #3,188, tagged as anum, pronounced /ˈsɐ̃j̃/.
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 17984, this pair ranks #53,119 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of ceia vs cem
Shared letters: ce. Private to "ceia": ai. Private to "cem": m.
"ceia" · 4 letters · shape CVVV · "cem" · 3 letters · shape CVC
Known mistypes of this pair
- ceia ← cceia · ceai · ciea · ecia
Frequently Asked Questions
Can "ceia" and "cem" be used interchangeably?
Which is more common, "ceia" or "cem"?
After this comparison
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "ceia" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "cem" - compare definitions side by side with the headword page. Word entry
- This pair ranks #53,119 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "ceia" and "cem" also get mixed up with nearby pairs, the highest-scored neighbour is "ceia vs cerda". 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 #53,119 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.