Which to use
“Aufbau” and “Ausbau” are a confusable German pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #2,189
- “Aufbau” frequency rank
- #3,170
- “Ausbau” frequency rank
- 5359
- confusion score
Side-by-Side Comparison
| Feature | Aufbau | Ausbau |
|---|---|---|
| Definition | der Vorgang des Aufbauens eines Gebäudes, eines Systems oder einer sonstwie gearteten Struktur | planmäßige Vergrößerung, Erweiterung von etwas Bestehendem |
Where the eye mixes Aufbau and Ausbau
Muted = shared; highlighted = the visual trap. They share 5 letters in sequence. Aufbau and Ausbau follow the identical consonant-vowel pattern (VVCCVV). Same shape at a glance is often the real trap, independent of shared letters.
Why the eye confuses Aufbau with Ausbau
A purely visual mix-up. Aufbau ([ˈaʊ̯fˌbaʊ̯]) and Ausbau ([ˈaʊ̯sˌbaʊ̯]) 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 a single letter - f in “Aufbau” becomes s in “Ausbau”. Our composite confusion score for this pair is 5359, derived from the frequency rank of both members and their visual similarity.
Aufbau is recorded at frequency rank #2,189, classified as anoun, pronounced [ˈaʊ̯fˌbaʊ̯]. Ausbau is at rank #3,170, tagged as anoun, pronounced [ˈaʊ̯sˌbaʊ̯].
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 5359, this pair ranks #1,995,005 of 2,006,359 scored German confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of Aufbau vs Ausbau
Shared letters: abu. Private to "Aufbau": f. Private to "Ausbau": s.
"Aufbau" · 6 letters · shape VVCCVV · "Ausbau" · 6 letters · shape VVCCVV
Known mistypes of this pair
Frequently Asked Questions
Is swapping "Aufbau" for "Ausbau" ever safe?
Frequency check: "Aufbau" vs "Ausbau" - which ranks higher?
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 "Aufbau" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "Ausbau" - compare definitions side by side with the headword page. Word entry
- This pair ranks #1,995,005 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
- "Aufbau" and "Ausbau" also get mixed up with nearby pairs, the highest-scored neighbour is "Ausbau vs ausgab". 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 #1,995,005 of 2,006,359 scored German pairs, corpus vintage 2026-09-03, not spelling advice.