Which to use
“sept” and “ses” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #3,981
- “sept” frequency rank
- #20,491
- “ses” frequency rank
- 24472
- confusion score
Side-by-Side Comparison
| Feature | sept | ses |
|---|---|---|
| Definition | A clan, tribe, or family, proceeding from a common progenitor; especially, one of the ancient clans of Ireland. | Alternative spelling of sess (sensimilla) |
Letter map: sept vs ses
Shared letters muted; letters that set sept and ses apart highlighted. Shared run: 2.
Pair insight - sept / ses
sept and ses are indexed as a confusable English pair. We have no recorded pronunciation or part of speech for both members, so the spelling overlap is what we can show you: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 24472, derived from the frequency rank of both members and their visual similarity.
sept is recorded at frequency rank #3,981, classified as anoun, pronounced /sɛpt/. ses is at rank #20,491, tagged as anoun.
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 24472, this pair ranks #401,692 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of sept vs ses
Shared letters: es. Private to "sept": pt. Private to "ses": -.
"sept" · 4 letters · shape CVCC · "ses" · 3 letters · shape CVC
Known mistypes of this pair
- sept ← espt · seppt · septt · setp · spet · ssept
Frequently Asked Questions
Is swapping "sept" for "ses" ever safe?
Which is more common, "sept" or "ses"?
Useful next steps
You've compared "sept" and "ses". Here's where to go from here.
- Full dictionary entry for "sept" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "ses" - compare definitions side by side with the headword page. Word entry
- This pair ranks #401,692 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "sept" and "ses" also get mixed up with nearby pairs, the highest-scored neighbour is "ses vs suds". 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 #401,692 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.