omeprazole

/əʊˈmɛp.ɹə.zəʊl/

//əʊˈmɛp.ɹə.zəʊl// noun

By · According to Wiktionary data (CC BY-SA) ·

"omeprazole" is a 10-letter English headword indexed on PlainSpell.

The verdict

“omeprazole” is uncommon English (frequency #95,213 among 1,431 “O” headwords), classed as a noun. The kind of spelling people second-guess.

#95,213
frequency rank, English
1,431
“O” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A substituted benzimidazole (trademark Losec, Prilosec) which is a proton pump inhibitor and inhibits secretion of gastric acid, being given orally in the treatment of ulcers and gastroesophageal r...

Corpus desk

Index EN-omeprazole · omeprazole · English

omeprazole · rank #95,213 · 0 variants · 0 confusables

  • FREQ-RARE #95,213
  • LEN-MEGA 10 letters
  • VOW-5 5 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 1,431
  • PHOTO-FINISH onde

Nearest frequency peer: onde (+1 rank slots)

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Long-tail ranks near “omeprazole”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

What this shows Long-tail view: where “omeprazole” sits against similarly uncommon English ranks.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for omeprazole
PropertyValue
Headwordomeprazole
LanguageEnglish
Part of speechNoun
IPA/əʊˈmɛp.ɹə.zəʊl/
Letters10
Frequency rank#95,213
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “omeprazole” in English

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).omeprazolefalls in this rarity band:

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

The axis is logarithmic, with each marked tick roughly ten times rarer than the last. Rare peers in the same band: “onde” (#95,214), “Okhotsk” (#95,211), “odium” (#95,208). Among 1,431 “O” headwords, “omeprazole” is #95,213. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

omeprazole is uncommon English at frequency #95,213 among 1,431 “O” headwords, classed as anoun, transcribed /əʊˈmɛp.ɹə.zəʊl/. Rarity is why readers land here mid-draft. Gloss: "A substituted benzimidazole (trademark Losec, Prilosec) which is a proton pump inhibitor and inhibits secretion of gastric acid, being given orally in the treatment of ulcers and gastroesophageal r...".

Our edit-distance generator produced no likely misspellings for omeprazole, a sign its spelling follows regular English conventions. Our confusable-pair dataset has no match for it, a sign it's visually distinctive enough not to be mixed up with another word.

Etymologically, the entry records: From o(xy)- + me(tho)- + -prazole (“benzimidazole derivative”). The correct English form is omeprazole, spelled O-M-E-P-R-A-Z-O-L-E.

Definition

  1. 1
    A substituted benzimidazole (trademark Losec, Prilosec) which is a proton pump inhibitor and inhibits secretion of gastric acid, being given orally in the treatment of ulcers and gastroesophageal reflux; 5-methoxy-2-(4-methoxy-3,5-dimethyl-2-pyridylmethylsulfinyl)benzimidazole, C₁₇H₁₉N₃O₃S.

Recorded use

Wiktionary example

These source excerpts show how omeprazole appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. 2001: The first successful drug of this class was omeprazole (sold under the trade name Losec®), and it helped to change the medium-sized Swedish pharmaceutical company Astra, which discovered it, into a major player in the pharmaceutical industry. — Leslie Iversen, Drugs: A Very Short Introduction (Oxford 2001, p. 46)

Etymology

From o(xy)- + me(tho)- + -prazole (“benzimidazole derivative”).

This word in other languages

omeprazol(Español)

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 "omeprazole"?
"omeprazole" is spelled O-M-E-P-R-A-Z-O-L-E. The IPA pronunciation is /əʊˈmɛp.ɹə.zəʊl/.
What does "omeprazole" mean?
As a noun, "omeprazole" means: A substituted benzimidazole (trademark Losec, Prilosec) which is a proton pump inhibitor and inhibits secretion of gastric acid, being given orally in the treatment of ulcers and gastroesophageal r...
How do you pronounce "omeprazole"?
The IPA (International Phonetic Alphabet) transcription for "omeprazole" is /əʊˈmɛp.ɹə.zəʊl/. 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 "omeprazole"?
From o(xy)- + me(tho)- + -prazole (“benzimidazole derivative”). 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.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "omeprazole", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 10 letters (nearest by frequency rank).

pepperidge#95,255persecutor#95,261mouthguard#95,160motherfuck#95,158

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

Source: FrequencyWords open word-frequency list