kojivsKyiWhich spelling fits?

Quick tell: koji is a noun, Kyi is a name, so they fill different roles in a sentence.

Which to use

“koji” is a noun and “Kyi” is a name - they look or sound alike but fill different roles in a sentence.

#46,016
“koji” frequency rank
#42,736
“Kyi” frequency rank
88752
confusion score

Side-by-Side Comparison

Feature koji Kyi
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 surname.

Letter map: koji vs Kyi

Shared letters muted; letters that set koji and Kyi apart highlighted. Shared run: 2. koji runs 4 letters (CVCV) against Kyi's 3 (CVV) - the length gap alone is often enough to separate them once you know to check it.

4 ch
koji
3 ch
Kyi

Grammar separator: koji vs Kyi

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: koji is anoun and Kyianame. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 88752, 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/. Kyi is at rank #42,736, tagged as aname.

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 88752, this pair ranks #5,955 of 530,003 scored English confusable pairs - among the most confusable pairs.

Orthographic DNA of koji vs Kyi

Shared letters: ik. Private to "koji": jo. Private to "Kyi": y.

"koji" · 4 letters · shape CVCV  ·  "Kyi" · 3 letters · shape CVV

Known mistypes of this pair

  • kojikjoi · kkoji · koij · kojji · okji

Frequently Asked Questions

Is swapping "koji" for "Kyi" ever safe?
No - they are not even the same part of speech. "koji" is a noun and "Kyi" a name, so a sentence built for one is usually ungrammatical with the other.
In ordinary English text, does "koji" or "Kyi" show up more?
"Kyi" is the more common of the two: it sits at frequency rank #42,736 in our English list, against #46,016 for "koji". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Pair "koji" vs "Kyi" is on the table, pick a follow-up below.

  • Full dictionary entry for "koji" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "Kyi" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #5,955 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "koji" and "Kyi" also get mixed up with nearby pairs, the highest-scored neighbour is "koji 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 #5,955 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