derenvsderleiTell them apart

Quick tell: deren is a unknown, derlei is a pronoun, so they fill different roles in a sentence.

Which to use

“deren” is an unknown and “derlei” is a pronoun - they look or sound alike but fill different roles in a sentence.

#326
“deren” frequency rank
#22,678
“derlei” frequency rank
23004
confusion score

Side-by-Side Comparison

Feature deren derlei
Definition Genitiv Singular des Pronomens die von solcher Art, derartig

Where the eye mixes deren and derlei

Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. deren runs 5 letters (CVCVC) against derlei's 6 (CVCCVV) - the length gap alone is often enough to separate them once you know to check it.

5 ch
deren
6 ch
derlei

Visual trap between deren and derlei

These two trip readers on the page rather than in the ear: deren is [ˈdeːʁən] while derlei is [ˈdeːɐ̯laɪ̯]. 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 (unknown vs pronoun), which is usually the fastest check. Our composite confusion score for this pair is 23004, derived from the frequency rank of both members and their visual similarity.

deren is recorded at frequency rank #326, classified as anunknown, pronounced [ˈdeːʁən]. derlei is at rank #22,678, tagged as apron, pronounced [ˈdeːɐ̯laɪ̯].

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 23004, this pair ranks #1,866,970 of 2,006,359 scored German confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of deren vs derlei

Shared letters: der. Private to "deren": n. Private to "derlei": il.

"deren" · 5 letters · shape CVCVC  ·  "derlei" · 6 letters · shape CVCCVV

Known mistypes of this pair

  • deren ← dderen · deern · derenn · derne · derren · dreen · edren
  • derlei ← dderlei · delrei · dereli · derlie · derllei · derrlei · drelei · edrlei

Frequently Asked Questions

Can "deren" and "derlei" be used interchangeably?
No - they are not even the same part of speech. "deren" is an unknown and "derlei" a pronoun, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "deren" vs "derlei" - which ranks higher?
"deren" is the more common of the two: it sits at frequency rank #326 in our German list, against #22,678 for "derlei". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

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

  • Full dictionary entry for "deren" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "derlei" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #1,866,970 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
  • "deren" and "derlei" also get mixed up with nearby pairs, the highest-scored neighbour is "degli vs derlei". 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 #1,866,970 of 2,006,359 scored German pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list