kojivsKopWhich spelling fits?

Which to use

“koji” and “Kop” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#46,016
“koji” frequency rank
#48,852
“Kop” frequency rank
94868
confusion score

Side-by-Side Comparison

Feature koji Kop
Definition A substance that is produced by letting a mold, especially Aspergillus oryzae, grow on rice, barley, soybeans, etc., used to make fermented products such as sake, amazake, miso, and soy sauce. A terrace at a football ground, originally for standing spectators, though all-seater stadia have been mandatory for larger UK clubs since 1994.

Where the eye mixes koji and Kop

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. koji runs 4 letters (CVCV) against Kop's 3 (CVC) - the length gap alone is often enough to separate them once you know to check it.

4 ch
koji
3 ch
Kop

Visual trap between koji and Kop

A purely visual mix-up. koji (/ˈkoʊd͡ʒi/) and Kop (/kɒp/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 94868, derived from the frequency rank of both members and their visual similarity.

koji is recorded at frequency rank #46,016, classified as anoun, pronounced /ˈkoʊd͡ʒi/. Kop is at rank #48,852, tagged as anoun, pronounced /kɒp/.

Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.

With a confusion score of 94868, this pair ranks #1,205 of 530,003 scored English confusable pairs - among the most confusable pairs.

Orthographic DNA of koji vs Kop

Shared letters: ko. Private to "koji": ij. Private to "Kop": p.

"koji" · 4 letters · shape CVCV  ·  "Kop" · 3 letters · shape CVC

Known mistypes of this pair

  • koji ← kjoi · kkoji · koij · kojji · okji

Frequently Asked Questions

Do "koji" and "Kop" mean the same thing in a sentence?
No. They are said differently (/ˈkoʊd͡ʒi/ versus /kɒp/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Which is more common, "koji" or "Kop"?
"koji" is the more common of the two: it sits at frequency rank #46,016 in our English list, against #48,852 for "Kop". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Eye-level mix-up between "koji" and "Kop" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "koji" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "Kop" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #1,205 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "koji" and "Kop" also get mixed up with nearby pairs, the highest-scored neighbour is "kno vs Kop". Nearby pair
  • Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes

Confusion rank #1,205 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list