sphincter

/ˈsfɪŋk.tɚ/

//ˈsfɪŋk.tɚ// noun

"sphincter" is a 9-letter English headword indexed on PlainSpell.

The verdict

“sphincter” is a moderately-common English word, ranked #39,102 in English word frequency and used as a noun.

#39,102
frequency rank, English
9
letters
15
tracked misspellings
3
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - 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.

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

sphincter vs splinter
78% similar
sphincter vs sprinter
78% similar
sphincter vs spinster
78% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for sphincter
PropertyValue
Headwordsphincter
LanguageEnglish
Part of speechNoun
IPA/ˈsfɪŋk.tɚ/
Letters9
Frequency rank#39,102
Misspellings tracked15
Confusable pairs3
SourceWiktionary (kaikki.org)

Where “sphincter” sits in English frequency

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right). sphincter lands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Spelling & Dictionary Insight

The English entry for sphincter is 9 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /ˈsfɪŋk.tɚ/. Corpus data places it at rank #39,102 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. The dominant gloss from Wiktionary reads: "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.".

Our generated misspelling index lists 15 likely wrong-spelling variants for sphincter, with forms such as "pshincter", "shpincter", and "sphhincter". Every one of these variants traces to a single-character edit -- an added or dropped letter, a swapped consonant, or a vowel swap -- the kind of slip a spell-checker is built to catch. It also participates in 3 confusable-pair relationships, "splinter", "sprinter", "spinster", since the words sound or look close enough that writers reach for the wrong one mid-sentence.

Etymologically, the entry records: Etymology tree Late Latin sphinctērlbor. English sphincter Learned borrowing from Late Latin sphinctēr (“the muscle of the anus”), from Ancient Greek σφῐγκτήρ (sphĭnktḗr, “lace, band; contractile muscle”), ultimately of Pre-Greek origin. Possibly related to… The correct English form is sphincter, spelled S-P-H-I-N-C-T-E-R.

Definition

  1. 1
    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.

Etymology

Etymology tree Late Latin sphinctērlbor. English sphincter Learned borrowing from Late Latin sphinctēr (“the muscle of the anus”), from Ancient Greek σφῐγκτήρ (sphĭnktḗr, “lace, band; contractile muscle”), ultimately of Pre-Greek origin. Possibly related to sphinx (“the strangler”).

This word in other languages

Common misspellings

Also misspelled as: pshincter,shpincter,sphhincter,sphicnter,sphinccter,sphincetr,sphincterr,sphinctre,sphinctter,sphinncter,sphintcer,sphnicter,spihncter,spphincter,ssphincter

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of sphincter - expressed in single-character edits (insert, delete, or swap one letter). Bigger bars stand out at a glance; a one-edit slip is the hardest to catch.

pshincter2shpincter2sphhincter1sphicnter2sphinccter1sphincetr2sphincterr1sphinctre2
Edit distance from "sphincter"

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "sphincter"?
"sphincter" is spelled S-P-H-I-N-C-T-E-R. The IPA pronunciation is /ˈsfɪŋk.tɚ/.
What does "sphincter" mean?
As a noun, "sphincter" means: 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.
What words are commonly confused with "sphincter"?
"sphincter" is commonly confused with "splinter", "sprinter", "spinster". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "sphincter"?
The IPA (International Phonetic Alphabet) transcription for "sphincter" is /ˈsfɪŋk.tɚ/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "sphincter"?
Etymology tree Late Latin sphinctērlbor. English sphincter Learned borrowing from Late Latin sphinctēr (“the muscle of the anus”), from Ancient Greek σφῐγκτήρ (sphĭnktḗr, “lace, band; contractile muscle”), ultimately of Pre-Greek origin. Possibly ... See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Using “sphincter”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is S-P-H-I-N-C-T-E-R - every other letter order is a misspelling in standard orthography.
  • Say it as /ˈsfɪŋk.tɚ/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • Don't mix it up with “splinter” - see the side-by-side comparison. sphincter vs splinter
  • Browse more English words and confusable pairs in the same reference. English words
Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

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

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list