koku
"koku" is a 4-letter English headword indexed on PlainSpell.
The verdict
“koku” is uncommon English (frequency #81,473 among 9,255 “K” headwords), classed as a noun. The kind of spelling people second-guess.
- #81,473
- frequency rank, English
- 9,255
- “K” headwords
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A unit of measure in feudal Japan, the amount of rice needed to feed one person for a year.
Corpus desk
Index EN-koku · koku · English
koku · rank #81,473 · 0 variants · 0 confusables
- FREQ-RARE #81,473
- LEN-MID 4 letters
- VOW-2 2 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-DENSE 9,255
- PHOTO-FINISH knitter
Nearest frequency peer: knitter (-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.
Frequency neighbourhood for “koku”
Lower corpus rank = more everyday usage (inverted bar length for readability)
- kinesthetic
kinesthetic
18,533 corpus weight
- Kinoshita
Kinoshita
18,532 corpus weight
- kitab
kitab
18,530 corpus weight
- knitter
knitter
18,529 corpus weight
- koku
koku
18,528 corpus weight
- Kosh
Kosh
18,525 corpus weight
What this shows Bars show where “koku” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.
| Property | Value |
|---|---|
| Headword | koku |
| Language | English |
| Part of speech | Noun |
| Letters | 4 |
| Frequency rank | #81,473 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “koku” sits in English frequency
Rare enough to double-check
koku is uncommon English at frequency #81,473 among 9,255 “K” headwords, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "A unit of measure in feudal Japan, the amount of rice needed to feed one person for a year.".
No generated misspelling entries exist for koku in our index, and the word's spelling is regular enough that our generator found nothing worth flagging. No close-neighbour confusable shows up for this headword in our dataset, a sign it's visually distinctive enough not to be mixed up with another word.
Etymologically, the entry records: Borrowed from Japanese 石. The correct English form is koku, spelled K-O-K-U.
Definition
- 1A unit of measure in feudal Japan, the amount of rice needed to feed one person for a year.
Etymology
Borrowed from Japanese 石.
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.
PlainSpell is rendered directly from structured Wiktionary extracts and open word-frequency lists, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 6, 2026. Primary sources: Wiktionary (via kaikki.org) and FrequencyWords.
Frequently Asked Questions
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "koku", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 4 letters (nearest by frequency rank).
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.