airvsausWhich spelling fits?

Quick tell: air is a noun, aus is a preposition, so they fill different roles in a sentence.

Which to use

“air” is a noun and “aus” is a preposition - they look or sound alike but fill different roles in a sentence.

#2,699
“air” frequency rank
#32
“aus” frequency rank
2731
confusion score

Side-by-Side Comparison

Feature air aus
Definition Luft, Atmosphäre, Luftraum von drinnen nach draußen

Where the eye mixes air and aus

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

3 ch
air
3 ch
aus

Visual trap between air and aus

These two trip readers on the page rather than in the ear: air is [ɛə(ɹ)] while aus is [aʊ̯s]. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (noun vs preposition), which is usually the fastest check. Our composite confusion score for this pair is 2731, derived from the frequency rank of both members and their visual similarity.

air is recorded at frequency rank #2,699, classified as anoun, pronounced [ɛə(ɹ)]. aus is at rank #32, tagged as aprep, pronounced [aʊ̯s].

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 2731, this pair ranks #2,001,709 of 2,006,359 scored German confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of air vs aus

Shared letters: a. Private to "air": ir. Private to "aus": su.

"air" · 3 letters · shape VVC  ·  "aus" · 3 letters · shape VVC

Frequently Asked Questions

Can "air" and "aus" be used interchangeably?
No - they are not even the same part of speech. "air" is a noun and "aus" a preposition, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "air" or "aus"?
"aus" is the more common of the two: it sits at frequency rank #32 in our German list, against #2,699 for "air". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Useful next steps

Eye-level mix-up between "air" and "aus" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "air" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "aus" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #2,001,709 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
  • "air" and "aus" also get mixed up with nearby pairs, the highest-scored neighbour is "air vs AUD". Nearby pair

Confusion rank #2,001,709 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