Which to use
“codex” and “core” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #22,932
- “codex” frequency rank
- #1,892
- “core” frequency rank
- 24824
- confusion score
Side-by-Side Comparison
| Feature | codex | core |
|---|---|---|
| Definition | An early manuscript book. | In general usage, an essential part of a thing surrounded by other essential things. |
Where the eye mixes codex and core
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Visual trap between codex and core
A purely visual mix-up. codex (/ˈkəʊdɛks/) and core (/kɔː/) 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 24824, derived from the frequency rank of both members and their visual similarity.
codex is recorded at frequency rank #22,932, classified as anoun, pronounced /ˈkəʊdɛks/. core is at rank #1,892, tagged as anoun, pronounced /kɔː/.
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 24824, this pair ranks #399,048 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of codex vs core
Shared letters: ceo. Private to "codex": dx. Private to "core": r.
"codex" · 5 letters · shape CVCVC · "core" · 4 letters · shape CVCV
Known mistypes of this pair
Frequently Asked Questions
Can "codex" and "core" be used interchangeably?
Frequency check: "codex" vs "core" - which ranks higher?
Useful next steps
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "codex" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "core" - compare definitions side by side with the headword page. Word entry
- This pair ranks #399,048 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "codex" and "core" also get mixed up with nearby pairs, the highest-scored neighbour is "codex vs cower". 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 #399,048 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.