sealvsseptWhat's the difference?

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

Which to use

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

#37,852
“seal” frequency rank
#25,045
“sept” frequency rank
62897
confusion score

Side-by-Side Comparison

Feature seal sept
Definition Sello. Siete.

Where the eye mixes seal and sept

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. seal (CVVC) and sept (CVCC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.

4 ch
seal
4 ch
sept

Visual trap between seal and sept

These two trip readers on the page rather than in the ear: seal is /siːl/ while sept is /sɛt/. 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 (noun vs num), which is usually the fastest check. Our composite confusion score for this pair is 62897, derived from the frequency rank of both members and their visual similarity.

seal is recorded at frequency rank #37,852, classified as anoun, pronounced /siːl/. sept is at rank #25,045, tagged as anum, pronounced /sɛt/.

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 62897, this pair ranks #50,510 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.

Orthographic DNA of seal vs sept

Shared letters: es. Private to "seal": al. Private to "sept": pt.

"seal" · 4 letters · shape CVVC  ·  "sept" · 4 letters · shape CVCC

Known mistypes of this pair

  • seal ← esal · seall · sseal
  • sept ← cept · espt · seppt · septt · setp · spet · ssept

Frequently Asked Questions

Is swapping "seal" for "sept" ever safe?
No - they are not even the same part of speech. "seal" is a noun and "sept" a num, so a sentence built for one is usually ungrammatical with the other.
In ordinary Spanish text, does "seal" or "sept" show up more?
"sept" is the more common of the two: it sits at frequency rank #25,045 in our Spanish list, against #37,852 for "seal". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Eye-level mix-up between "seal" and "sept" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "seal" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "sept" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #50,510 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "seal" and "sept" also get mixed up with nearby pairs, the highest-scored neighbour is "seal vs shall". 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 #50,510 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