AusbauvsAuslaufWhat's the difference?

Which to use

“Ausbau” and “Auslauf” are a confusable German pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#3,170
“Ausbau” frequency rank
#35,076
“Auslauf” frequency rank
38246
confusion score

Side-by-Side Comparison

Feature Ausbau Auslauf
Definition planmäßige Vergrößerung, Erweiterung von etwas Bestehendem Bewegungsfreiheit für jemanden oder etwas

Where the eye mixes Ausbau and Auslauf

Muted = shared; highlighted = the visual trap. They share 5 letters in sequence. Ausbau runs 6 letters (VVCCVV) against Auslauf's 7 (VVCCVVC) - the length gap alone is often enough to separate them once you know to check it.

6 ch
Ausbau
7 ch
Auslauf

Why the eye confuses Ausbau with Auslauf

A purely visual mix-up. Ausbau ([ˈaʊ̯sˌbaʊ̯]) and Auslauf ([aʊ̯slaʊ̯f]) 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 38246, derived from the frequency rank of both members and their visual similarity.

Ausbau is recorded at frequency rank #3,170, classified as anoun, pronounced [ˈaʊ̯sˌbaʊ̯]. Auslauf is at rank #35,076, tagged as anoun, pronounced [aʊ̯slaʊ̯f].

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 38246, this pair ranks #1,568,965 of 2,006,359 scored German confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of Ausbau vs Auslauf

Shared letters: asu. Private to "Ausbau": b. Private to "Auslauf": fl.

"Ausbau" · 6 letters · shape VVCCVV  ·  "Auslauf" · 7 letters · shape VVCCVVC

Known mistypes of this pair

  • Ausbau ← asubau · aubsau · ausabu · ausbbau · ausbua · aussbau · uasbau
  • Auslauf ← asulauf · aulsauf · ausaluf · auslafu · auslauff · ausllauf · ausluaf · ausslauf

Frequently Asked Questions

Do "Ausbau" and "Auslauf" mean the same thing in a sentence?
No. They are said differently ([ˈaʊ̯sˌbaʊ̯] versus [aʊ̯slaʊ̯f]) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Frequency check: "Ausbau" vs "Auslauf" - which ranks higher?
"Ausbau" is the more common of the two: it sits at frequency rank #3,170 in our German list, against #35,076 for "Auslauf". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

What to do next

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

  • Full dictionary entry for "Ausbau" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "Auslauf" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #1,568,965 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
  • "Ausbau" and "Auslauf" also get mixed up with nearby pairs, the highest-scored neighbour is "Auslauf vs Ausruf". 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 #1,568,965 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