Which to use
“koji” and “kook” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #46,016
- “koji” frequency rank
- #43,741
- “kook” frequency rank
- 89757
- confusion score
Side-by-Side Comparison
| Feature | koji | kook |
|---|---|---|
| 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. | An eccentric, strange or crazy person. |
Where the spellings diverge
Shared letters are muted; the letters that actually set koji and kook apart are highlighted. They share 2 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
A purely visual mix-up. koji (/ˈkoʊd͡ʒi/) and kook (/kuːk/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 89757, 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/. kook is at rank #43,741, tagged as anoun, pronounced /kuːk/.
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 89757, this pair ranks #4,838 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of koji vs kook
Shared letters: ko. Private to "koji": ij. Private to "kook": -.
"koji" · 4 letters · shape CVCV · "kook" · 4 letters · shape CVVC
Known mistypes of this pair
Frequency comparison
Frequently Asked Questions
Can "koji" and "kook" be used interchangeably?
Which is more common, "koji" or "kook"?
Remembering koji vs kook
The fastest way to pick the right one every time.
- Read both glosses above and match the meaning you intend, only context separates this pair.
- See each word in full, definition, IPA, etymology and its other confusables. Full “koji” entry
- Browse more pairs most likely to be confused. Most confusable