Which to use
“sei” is a num and “sud” is a noun - they look or sound alike but fill different roles in a sentence.
- #48,072
- “sei” frequency rank
- #14,016
- “sud” frequency rank
- 62088
- confusion score
Side-by-Side Comparison
| Feature | sei | sud |
|---|---|---|
| Definition | Seis. | Uno de los cuatro puntos cardinales, el especificado por los 180°, dirigido hacia el polo sur, por convención la dirección hacia abajo en un mapa. |
Where the eye mixes sei and sud
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Visual trap between sei and sud
These two trip readers on the page rather than in the ear: sei is /s̺ej/ while sud is [ˈsuð̞]. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (num vs noun), which is usually the fastest check. Our composite confusion score for this pair is 62088, derived from the frequency rank of both members and their visual similarity.
sei is recorded at frequency rank #48,072, classified as anum, pronounced /s̺ej/. sud is at rank #14,016, tagged as anoun, pronounced [ˈsuð̞].
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 62088, this pair ranks #53,184 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.
Orthographic DNA of sei vs sud
Shared letters: s. Private to "sei": ei. Private to "sud": du.
"sei" · 3 letters · shape CVV · "sud" · 3 letters · shape CVC
Frequently Asked Questions
Is swapping "sei" for "sud" ever safe?
Which is more common, "sei" or "sud"?
Useful next steps
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "sei" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "sud" - compare definitions side by side with the headword page. Word entry
- This pair ranks #53,184 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "sei" and "sud" also get mixed up with nearby pairs, the highest-scored neighbour is "sei vs stem". Nearby pair
Confusion rank #53,184 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.