codexvscoserWhich spelling fits?

Quick tell: codex is a noun, coser is a verb, so they fill different roles in a sentence.

Which to use

“codex” is a noun and “coser” is a verb - they look or sound alike but fill different roles in a sentence.

#48,897
“codex” frequency rank
#17,653
“coser” frequency rank
66550
confusion score

Side-by-Side Comparison

Feature codex coser
Definition Tronco, tallo. Usar hilo para juntar pedazos de tela, cuero u otro material flexible.

Where the eye mixes codex and coser

Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.

5 ch
codex
5 ch
coser

Why the eye confuses codex with coser

These two trip readers on the page rather than in the ear: codex is /ˈko.deks/ while coser is [koˈseɾ]. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (noun vs verb), which is usually the fastest check. Our composite confusion score for this pair is 66550, derived from the frequency rank of both members and their visual similarity.

codex is recorded at frequency rank #48,897, classified as anoun, pronounced /ˈko.deks/. coser is at rank #17,653, tagged as averb, pronounced [koˈseɾ].

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 66550, this pair ranks #39,575 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.

Orthographic DNA of codex vs coser

Shared letters: ceo. Private to "codex": dx. Private to "coser": rs.

"codex" · 5 letters · shape CVCVC  ·  "coser" · 5 letters · shape CVCVC

Known mistypes of this pair

  • codexccodex · cdoex · coddex · codexx · codxe · coedx · ocdex
  • coserccoser · coesr · coserr · cosre · cosser · csoer · ocser

Frequently Asked Questions

Can "codex" and "coser" be used interchangeably?
No - they are not even the same part of speech. "codex" is a noun and "coser" a verb, so a sentence built for one is usually ungrammatical with the other.
In ordinary Spanish text, does "codex" or "coser" show up more?
"coser" is the more common of the two: it sits at frequency rank #17,653 in our Spanish list, against #48,897 for "codex". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

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 "coser" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #39,575 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "codex" and "coser" also get mixed up with nearby pairs, the highest-scored neighbour is "cade vs codex". 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 #39,575 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list