Which to use
“al” is a contraction and “auf” is a preposition - they look or sound alike but fill different roles in a sentence.
- #21
- “al” frequency rank
- #35,364
- “auf” frequency rank
- 35385
- confusion score
Side-by-Side Comparison
| Feature | al | auf |
|---|---|---|
| Definition | Contracción de la preposición a y el artículo el (masculino singular) Forma obligatoriamente contracta; la forma *a el no está aceptada por la Real Academia. Se utiliza para todos los valores de a. | Arriba de, sobre, en. |
Where the eye mixes al and auf
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Visual trap between al and auf
These two trip readers on the page rather than in the ear: al is [al] while auf is [aʊ̯f]. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (contraction vs preposition), which is usually the fastest check. Our composite confusion score for this pair is 35385, derived from the frequency rank of both members and their visual similarity.
al is recorded at frequency rank #21, classified as acontraction, pronounced [al]. auf is at rank #35,364, tagged as aprep, 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 35385, this pair ranks #186,384 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of al vs auf
Shared letters: a. Private to "al": l. Private to "auf": fu.
"al" · 2 letters · shape VC · "auf" · 3 letters · shape VVC
Frequently Asked Questions
Can "al" and "auf" be used interchangeably?
Frequency check: "al" vs "auf" - which ranks higher?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "al" 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 #186,384 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "al" and "auf" also get mixed up with nearby pairs, the highest-scored neighbour is "atl vs auf". Nearby pair
Confusion rank #186,384 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.