Which to use
“ach” is an intj and “auf” is an adverb - they look or sound alike but fill different roles in a sentence.
- #48,212
- “ach” frequency rank
- #42,318
- “auf” frequency rank
- 90530
- confusion score
Side-by-Side Comparison
| Feature | ach | auf |
|---|---|---|
| Definition | oh | aberto |
Letter map: ach vs auf
Shared letters muted; letters that set ach and auf apart highlighted. Shared run: 1. ach (VCC) and auf (VVC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Part-of-speech tell for ach / auf
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: ach is anintj and aufanadverb. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 90530, derived from the frequency rank of both members and their visual similarity.
ach is recorded at frequency rank #48,212, classified as anintj. auf is at rank #42,318, tagged as anadv, pronounced /aʊ̯f/.
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 90530, this pair ranks #264 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.
Orthographic DNA of ach vs auf
Shared letters: a. Private to "ach": ch. Private to "auf": fu.
"ach" · 3 letters · shape VCC · "auf" · 3 letters · shape VVC
Frequently Asked Questions
Do "ach" and "auf" mean the same thing in a sentence?
Which is more common, "ach" or "auf"?
After this comparison
You've compared "ach" and "auf". Here's where to go from here.
- Full dictionary entry for "ach" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "auf" - compare definitions side by side with the headword page. Word entry
- This pair ranks #264 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "ach" and "auf" also get mixed up with nearby pairs, the highest-scored neighbour is "ach vs acs". Nearby pair
Confusion rank #264 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.