catalase
"catalase" is a 8-letter English headword indexed on PlainSpell.
The verdict
“catalase” is uncommon English (frequency #73,949 among 5,599 “C” headwords), classed as a noun. The kind of spelling people second-guess.
- #73,949
- frequency rank, English
- 5,599
- “C” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - An enzyme found in the liver that catalyses the decomposition of hydrogen peroxide to water and oxygen.
Corpus desk
Index EN-catalase · catalase · English
catalase · rank #73,949 · 0 variants · 0 confusables
- FREQ-RARE #73,949
- LEN-LONG 8 letters
- VOW-4 4 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-DENSE 5,599
- PHOTO-FINISH Carribean
Nearest frequency peer: Carribean (-2 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 “catalase”
Sparse band: bars invert rank so rarer forms read shorter
- Caldecott
Caldecott
26,060 corpus weight
- carden
carden
26,056 corpus weight
- Carribean
Carribean
26,054 corpus weight
- catalase
catalase
26,052 corpus weight
- centripetal
centripetal
26,047 corpus weight
- chambermaid
chambermaid
26,045 corpus weight
What this shows Long-tail view: where “catalase” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | catalase |
| Language | English |
| Part of speech | Noun |
| Letters | 8 |
| Frequency rank | #73,949 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “catalase” in English
Rare enough to double-check
catalase is uncommon English at frequency #73,949 among 5,599 “C” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "An enzyme found in the liver that catalyses the decomposition of hydrogen peroxide to water and oxygen.".
No generated misspelling entries exist for catalase in our index, suggesting the orthography follows predictable English patterns. Our dataset records no confusable match here, which tends to mean the word is visually distinctive enough to stand on its own.
Etymologically, the entry records: From catalysis + -ase. The correct English form is catalase, spelled C-A-T-A-L-A-S-E.
Definition
- 1An enzyme found in the liver that catalyses the decomposition of hydrogen peroxide to water and oxygen.
Etymology
From catalysis + -ase.
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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Similar English words by spelling shape
Same letter count and similar misspelling depth for "catalase", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 8 letters (nearest by frequency rank).