Which to use
“sphincter” and “spinster” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #39,102
- “sphincter” frequency rank
- #42,416
- “spinster” frequency rank
- 81518
- confusion score
Side-by-Side Comparison
| Feature | sphincter | spinster |
|---|---|---|
| Definition | A ringlike band of muscle that surrounds a bodily opening (such as the anus or the openings of the stomach), constricting and relaxing as required for normal physiological functioning. | A woman who has never been married, especially one past the typical marrying age according to social traditions. |
Where the eye mixes sphincter and spinster
Muted = shared; highlighted = the visual trap. They share 7 letters in sequence. sphincter runs 9 letters (CCCVCCCVC) against spinster's 8 (CCVCCCVC) - the length gap alone is often enough to separate them once you know to check it.
Look-alike desk: sphincter vs spinster
A purely visual mix-up. sphincter (/ˈsfɪŋk.tɚ/) and spinster (/ˈspɪnstə/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 81518, derived from the frequency rank of both members and their visual similarity.
sphincter is recorded at frequency rank #39,102, classified as anoun, pronounced /ˈsfɪŋk.tɚ/. spinster is at rank #42,416, tagged as anoun, pronounced /ˈspɪnstə/.
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 81518, this pair ranks #17,511 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of sphincter vs spinster
Shared letters: einprst. Private to "sphincter": ch. Private to "spinster": -.
"sphincter" · 9 letters · shape CCCVCCCVC · "spinster" · 8 letters · shape CCVCCCVC
Known mistypes of this pair
Frequently Asked Questions
Do "sphincter" and "spinster" mean the same thing in a sentence?
Frequency check: "sphincter" vs "spinster" - which ranks higher?
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 "sphincter" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "spinster" - compare definitions side by side with the headword page. Word entry
- This pair ranks #17,511 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "sphincter" and "spinster" also get mixed up with nearby pairs, the highest-scored neighbour is "Spenser vs spinster". 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 #17,511 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.