ATPase
/eɪtiːˈpiːeɪz/
"atpase" is a 6-letter English headword indexed on PlainSpell.
The verdict
“ATPase” is uncommon English (frequency #51,549 among 3,931 “A” headwords), classed as a noun. The kind of spelling people second-guess.
- #51,549
- frequency rank, English
- 3,931
- “A” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A type of enzyme which works to convert adenosine triphosphate (ATP) into adenosine diphosphate (ADP) and a free phosphate ion, thereby releasing energy to be used in cellular activity.
Corpus desk
Index EN-atpase · ATPase · English
ATPase · rank #51,549 · 0 variants · 0 confusables
- FREQ-RARE #51,549
- LEN-LONG 6 letters
- VOW-3 3 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 3,931
- PHOTO-FINISH astern
Nearest frequency peer: astern (-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 “ATPase”
Sparse band: bars invert rank so rarer forms read shorter
- Ashish
Ashish
48,456 corpus weight
- Ashkenazi
Ashkenazi
48,455 corpus weight
- astern
astern
48,453 corpus weight
- ATPase
ATPase
48,452 corpus weight
- Audra
Audra
48,451 corpus weight
- autofocus
autofocus
48,450 corpus weight
What this shows Long-tail view: where “ATPase” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | ATPase |
| Language | English |
| Part of speech | Noun |
| IPA | /eɪtiːˈpiːeɪz/ |
| Letters | 6 |
| Frequency rank | #51,549 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “ATPase” in English
Rare enough to double-check
ATPase is uncommon English at frequency #51,549 among 3,931 “A” headwords, classed as anoun, transcribed /eɪtiːˈpiːeɪz/. Rarity is why readers land here mid-draft. Gloss: "A type of enzyme which works to convert adenosine triphosphate (ATP) into adenosine diphosphate (ADP) and a free phosphate ion, thereby releasing energy to be used in cellular activity.".
No misspelling variants are generated for ATPase in our index, a sign its spelling follows regular English conventions. Our confusable-pair dataset has no match for it, which tends to mean the word is visually distinctive enough to stand on its own.
Etymologically, the entry records: From ATP + -ase. The correct English form is ATPase, spelled A-T-P-A-S-E.
Definition
- 1A type of enzyme which works to convert adenosine triphosphate (ATP) into adenosine diphosphate (ADP) and a free phosphate ion, thereby releasing energy to be used in cellular activity.
Etymology
From ATP + -ase.
Synonyms
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.
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "ATPase", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 6 letters (nearest by frequency rank).