secavsseisWhich spelling fits?

Quick tell: seca is a noun, seis is a num, so they fill different roles in a sentence.

Which to use

“seca” is a noun and “seis” is a num - they look or sound alike but fill different roles in a sentence.

#2,805
“seca” frequency rank
#542
“seis” frequency rank
3347
confusion score

Side-by-Side Comparison

Feature seca seis
Definition período sem chuva número equivalente a cinco mais um; cardinalidade de um conjunto que contenha seis elementos distintos; representado pelo símbolo 6 (algarismos arábicos) ou VI (algarismos romanos)

Letter map: seca vs seis

Shared letters muted; letters that set seca and seis apart highlighted. Shared run: 2.

4 ch
seca
4 ch
seis

Part-of-speech tell for seca / seis

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: seca is anoun and seisanum. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 3347, derived from the frequency rank of both members and their visual similarity.

seca is recorded at frequency rank #2,805, classified as anoun, pronounced /ˈsɛ.kɐ/. seis is at rank #542, tagged as anum.

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 3347, this pair ranks #71,825 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of seca vs seis

Shared letters: es. Private to "seca": ac. Private to "seis": i.

"seca" · 4 letters · shape CVCV  ·  "seis" · 4 letters · shape CVVC

Known mistypes of this pair

  • secaesca · scea · seac · secca · sseca
  • seisesis · seiss · sesi · sies · sseis

Frequently Asked Questions

Can "seca" and "seis" be used interchangeably?
No - they are not even the same part of speech. "seca" is a noun and "seis" a num, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "seca" vs "seis" - which ranks higher?
"seis" is the more common of the two: it sits at frequency rank #542 in our Portuguese list, against #2,805 for "seca". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

You've compared "seca" and "seis". Here's where to go from here.

  • Full dictionary entry for "seca" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "seis" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #71,825 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "seca" and "seis" also get mixed up with nearby pairs, the highest-scored neighbour is "seca vs senda". 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 #71,825 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