siedvssilexTell them apart

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

Which to use

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

#29,975
“sied” frequency rank
#20,854
“silex” frequency rank
50829
confusion score

Side-by-Side Comparison

Feature sied silex
Definition Troisième personne du singulier de l’indicatif présent de seoir. Roche chimique siliceuse très dure se présentant sous forme de nodules de taille variable à la surface ou dans les formations calcaires et constituée de calcédoine presque pure et d’impuretés telles que de l'eau ou des oxydes, ces derniers influant sur sa couleur.

Where the eye mixes sied and silex

Muted = shared; highlighted = the visual trap. They share 3 letters in sequence. sied runs 4 letters (CVVC) against silex's 5 (CVCVC) - the length gap alone is often enough to separate them once you know to check it.

4 ch
sied
5 ch
silex

Why the eye confuses sied with silex

These two trip readers on the page rather than in the ear: sied is \sje\ while silex is \si.lɛks\. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (verb vs noun), which is usually the fastest check. Our composite confusion score for this pair is 50829, derived from the frequency rank of both members and their visual similarity.

sied is recorded at frequency rank #29,975, classified as averb, pronounced \sje\. silex is at rank #20,854, tagged as anoun, pronounced \si.lɛks\.

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 50829, this pair ranks #159,623 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of sied vs silex

Shared letters: eis. Private to "sied": d. Private to "silex": lx.

"sied" · 4 letters · shape CVVC  ·  "silex" · 5 letters · shape CVCVC

Known mistypes of this pair

  • sied ← ised · seid · siedd · ssied
  • silex ← islex · sielx · silexx · sillex · silxe · sliex · ssilex

Frequently Asked Questions

Is swapping "sied" for "silex" ever safe?
No - they are not even the same part of speech. "sied" is a verb and "silex" a noun, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "sied" or "silex"?
"silex" is the more common of the two: it sits at frequency rank #20,854 in our French list, against #29,975 for "sied". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

  • Full dictionary entry for "sied" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "silex" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #159,623 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "sied" and "silex" also get mixed up with nearby pairs, the highest-scored neighbour is "sied vs sires". 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 #159,623 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list