seivsSUVWhich spelling fits?

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

Which to use

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

#48,072
“sei” frequency rank
#40,009
“SUV” frequency rank
88081
confusion score

Side-by-Side Comparison

Feature sei SUV
Definition Seis. Vehículo práctico dedicado para la diversión o el ocio, muchas veces con una buena capacidad en el maletero para portar el equipamiento para la práctica de algún deporte.

Where the eye mixes sei and SUV

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence. sei (CVV) and SUV (CVC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.

3 ch
sei
3 ch
SUV

Look-alike desk: sei vs SUV

These two trip readers on the page rather than in the ear: sei is /s̺ej/ while SUV is [ˈsuβ̞]. 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 88081, 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/. SUV is at rank #40,009, tagged as anoun, pronounced [ˈsuβ̞].

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 88081, this pair ranks #4,017 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.

Orthographic DNA of sei vs SUV

Shared letters: s. Private to "sei": ei. Private to "SUV": uv.

"sei" · 3 letters · shape CVV  ·  "SUV" · 3 letters · shape CVC

Frequently Asked Questions

Can "sei" and "SUV" be used interchangeably?
No - they are not even the same part of speech. "sei" is a num and "SUV" a noun, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "sei" vs "SUV" - which ranks higher?
"SUV" is the more common of the two: it sits at frequency rank #40,009 in our Spanish list, against #48,072 for "sei". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

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 "SUV" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #4,017 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "sei" and "SUV" also get mixed up with nearby pairs, the highest-scored neighbour is "sei vs stem". Nearby pair

Confusion rank #4,017 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list