Which to use
“sein” is a verb and “seis” is a num - they look or sound alike but fill different roles in a sentence.
- #43,647
- “sein” frequency rank
- #542
- “seis” frequency rank
- 44189
- confusion score
Side-by-Side Comparison
| Feature | sein | seis |
|---|---|---|
| Definition | ser, estar. | 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: sein vs seis
Shared letters muted; letters that set sein and seis apart highlighted. Shared run: 3.
Grammar separator: sein vs seis
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: sein is averb and seisanum. On the page they differ by a single letter - n in “sein” becomes s in “seis”. Our composite confusion score for this pair is 44189, derived from the frequency rank of both members and their visual similarity.
sein is recorded at frequency rank #43,647, classified as averb, pronounced /zaɪ̯n/. 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 44189, this pair ranks #21,345 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of sein vs seis
Shared letters: eis. Private to "sein": n. Private to "seis": -.
"sein" · 4 letters · shape CVVC · "seis" · 4 letters · shape CVVC
Known mistypes of this pair
Frequently Asked Questions
Can "sein" and "seis" be used interchangeably?
Frequency check: "sein" vs "seis" - which ranks higher?
Useful next steps
Done with this confusable. These links stay specific to "sein" and "seis".
- Full dictionary entry for "sein" 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 #21,345 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "sein" and "seis" also get mixed up with nearby pairs, the highest-scored neighbour is "sein vs slip". 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 #21,345 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.