Which to use
“sept” is a num and “spy” is a noun - they look or sound alike but fill different roles in a sentence.
- #25,045
- “sept” frequency rank
- #48,092
- “spy” frequency rank
- 73137
- confusion score
Side-by-Side Comparison
| Feature | sept | spy |
|---|---|---|
| Definition | Siete. | Espía. |
Where the eye mixes sept and spy
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. sept runs 4 letters (CVCC) against spy's 3 (CCV) - the length gap alone is often enough to separate them once you know to check it.
Visual trap between sept and spy
These two trip readers on the page rather than in the ear: sept is /sɛt/ while spy is /spaɪ/. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (num vs noun), which is usually the fastest check. Our composite confusion score for this pair is 73137, derived from the frequency rank of both members and their visual similarity.
sept is recorded at frequency rank #25,045, classified as anum, pronounced /sɛt/. spy is at rank #48,092, tagged as anoun, pronounced /spaɪ/.
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 73137, this pair ranks #23,923 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.
Orthographic DNA of sept vs spy
Shared letters: ps. Private to "sept": et. Private to "spy": y.
"sept" · 4 letters · shape CVCC · "spy" · 3 letters · shape CCV
Known mistypes of this pair
- sept ← cept · espt · seppt · septt · setp · spet · ssept
Frequently Asked Questions
Can "sept" and "spy" be used interchangeably?
Which is more common, "sept" or "spy"?
Useful next steps
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "sept" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "spy" - compare definitions side by side with the headword page. Word entry
- This pair ranks #23,923 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "sept" and "spy" also get mixed up with nearby pairs, the highest-scored neighbour is "sei vs spy". 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 #23,923 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.