Which to use
“ausfüllen” and “auszufüllen” are a confusable German pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #10,810
- “ausfüllen” frequency rank
- #28,084
- “auszufüllen” frequency rank
- 38894
- confusion score
Side-by-Side Comparison
| Feature | ausfüllen | auszufüllen |
|---|---|---|
| Definition | ein Formular ergänzen | erweiterter Infinitiv Aktiv des Verbs ausfüllen |
Where the eye mixes ausfüllen and auszufüllen
Muted = shared; highlighted = the visual trap. They share 9 letters in sequence. ausfüllen runs 9 letters (VVCCVCCVC) against auszufüllen's 11 (VVCCVCVCCVC) - the length gap alone is often enough to separate them once you know to check it.
Why the eye confuses ausfüllen with auszufüllen
A purely visual mix-up. ausfüllen ([ˈaʊ̯sˌfʏlən]) and auszufüllen ([ˈaʊ̯st͡suˌfʏlən]) 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 2 letter(s) in length. Our composite confusion score for this pair is 38894, derived from the frequency rank of both members and their visual similarity.
ausfüllen is recorded at frequency rank #10,810, classified as averb, pronounced [ˈaʊ̯sˌfʏlən]. auszufüllen is at rank #28,084, tagged as averb, pronounced [ˈaʊ̯st͡suˌfʏlən].
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 38894, this pair ranks #1,551,791 of 2,006,359 scored German confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of ausfüllen vs auszufüllen
Shared letters: aeflnsuü. Private to "ausfüllen": -. Private to "auszufüllen": z.
"ausfüllen" · 9 letters · shape VVCCVCCVC · "auszufüllen" · 11 letters · shape VVCCVCVCCVC
Frequently Asked Questions
Can "ausfüllen" and "auszufüllen" be used interchangeably?
Which is more common, "ausfüllen" or "auszufüllen"?
After this comparison
Eye-level mix-up between "ausfüllen" and "auszufüllen" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "ausfüllen" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "auszufüllen" - compare definitions side by side with the headword page. Word entry
- This pair ranks #1,551,791 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
- "ausfüllen" and "auszufüllen" also get mixed up with nearby pairs, the highest-scored neighbour is "aufzufallen vs auszufüllen". Nearby pair
Confusion rank #1,551,791 of 2,006,359 scored German pairs, corpus vintage 2026-09-03, not spelling advice.