FehlervsflerWhat's the difference?

Quick tell: Fehler is a noun, fler is an adjective, so they fill different roles in a sentence.

Which to use

“Fehler” is a noun and “fler” is an adjective - they look or sound alike but fill different roles in a sentence.

#746
“Fehler” frequency rank
#32,036
“fler” frequency rank
32782
confusion score

Side-by-Side Comparison

Feature Fehler fler
Definition Abweichung von einem optimalen Zustand, Verfahren oder dem Richtigen mehr, eine größere Anzahl (als)

Where the eye mixes Fehler and fler

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

6 ch
Fehler
4 ch
fler

Look-alike desk: Fehler vs fler

These two trip readers on the page rather than in the ear: Fehler is [ˈfeːlɐ] while fler is [ˈfleːr]. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 letter(s) in length, and the parts of speech differ too (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 32782, derived from the frequency rank of both members and their visual similarity.

Fehler is recorded at frequency rank #746, classified as anoun, pronounced [ˈfeːlɐ]. fler is at rank #32,036, tagged as anadj, pronounced [ˈfleːr].

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 32782, this pair ranks #1,700,154 of 2,006,359 scored German confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of Fehler vs fler

Shared letters: eflr. Private to "Fehler": h. Private to "fler": -.

"Fehler" · 6 letters · shape CVCCVC  ·  "fler" · 4 letters · shape CCVC

Known mistypes of this pair

  • Fehler ← efhler · fehelr · fehhler · fehlerr · fehller · fehlre · felher · ffehler
  • fler ← felr · ffler · flerr · fller · flre · lfer

Frequently Asked Questions

Do "Fehler" and "fler" mean the same thing in a sentence?
No - they are not even the same part of speech. "Fehler" is a noun and "fler" an adjective, so a sentence built for one is usually ungrammatical with the other.
In ordinary German text, does "Fehler" or "fler" show up more?
"Fehler" is the more common of the two: it sits at frequency rank #746 in our German list, against #32,036 for "fler". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

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 "Fehler" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "fler" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #1,700,154 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
  • "Fehler" and "fler" also get mixed up with nearby pairs, the highest-scored neighbour is "fler vs Flyern". 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 #1,700,154 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