heparin
/ˈhɛp.ə.ɹɪn/
"heparin" is a 7-letter English headword indexed on PlainSpell.
The verdict
“heparin” is a moderately-common English word, ranked #45,422 in English word frequency and used as a noun.
- #45,422
- frequency rank, English
- 7
- letters
- 10
- tracked misspellings
- 3
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A compound occurring in the liver and other tissues which inhibits blood coagulation. A sulfur-containing polysaccharide, it is used as an anticoagulant in the treatment of thrombosis.
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | heparin |
| Language | English |
| Part of speech | Noun |
| IPA | /ˈhɛp.ə.ɹɪn/ |
| Letters | 7 |
| Frequency rank | #45,422 |
| Misspellings tracked | 10 |
| Confusable pairs | 3 |
| Source | Wiktionary (kaikki.org) |
Where “heparin” sits in English frequency
Spelling & Dictionary Insight
The English entry for heparin is 7 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /ˈhɛp.ə.ɹɪn/. Corpus data places it at rank #45,422 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. The dominant gloss from Wiktionary reads: "A compound occurring in the liver and other tissues which inhibits blood coagulation. A sulfur-containing polysaccharide, it is used as an anticoagulant in the treatment of thrombosis.".
Our generated misspelling index lists 10 likely wrong-spelling variants for heparin, with forms such as "ehparin", "heaprin", and "hepairn". 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, "hepatic", "hearn", "hearing", a pairing that trips writers up because the two words share enough sound or shape to blur together.
Etymologically, the entry records: From Latin hepar (“liver”) + -in. The correct English form is heparin, spelled H-E-P-A-R-I-N.
Definition
- 1A compound occurring in the liver and other tissues which inhibits blood coagulation. A sulfur-containing polysaccharide, it is used as an anticoagulant in the treatment of thrombosis.
Etymology
From Latin hepar (“liver”) + -in.
This word in other languages
Common misspellings
Also misspelled as: ehparin,heaprin,hepairn,heparinn,heparni,heparrin,hepparin,heprain,hheparin,hpearin
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of heparin - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.
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
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Using “heparin”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is H-E-P-A-R-I-N - every other letter order is a misspelling in standard orthography.
- Say it as /ˈhɛp.ə.ɹɪn/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “hepatic” - see the side-by-side comparison. heparin vs hepatic
- 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.