ajustarvsasustarTell them apart

Which to use

“ajustar” and “asustar” are a confusable Spanish pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#10,257
“ajustar” frequency rank
#16,268
“asustar” frequency rank
26525
confusion score

Side-by-Side Comparison

Feature ajustar asustar
Definition Modificar hasta llevar a la forma o tamaño justo o adecuado, en particular para permitir que case o que no discrepe con otra cosa, o que sus partes se acoplen bien. Dar un susto.

Where the eye mixes ajustar and asustar

Muted = shared; highlighted = the visual trap. They share 6 letters in sequence. ajustar and asustar follow the identical consonant-vowel pattern (VCVCCVC). Same shape at a glance is often the real trap, independent of shared letters.

7 ch
ajustar
7 ch
asustar

Why the eye confuses ajustar with asustar

A purely visual mix-up. ajustar ([axusˈt̪aɾ]) and asustar ([asusˈt̪aɾ]) 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 - j in “ajustar” becomes s in “asustar”. Our composite confusion score for this pair is 26525, derived from the frequency rank of both members and their visual similarity.

ajustar is recorded at frequency rank #10,257, classified as averb, pronounced [axusˈt̪aɾ]. asustar is at rank #16,268, tagged as averb, pronounced [asusˈt̪aɾ].

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 26525, this pair ranks #231,201 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of ajustar vs asustar

Shared letters: arstu. Private to "ajustar": j. Private to "asustar": -.

"ajustar" · 7 letters · shape VCVCCVC  ·  "asustar" · 7 letters · shape VCVCCVC

Known mistypes of this pair

  • ajustar ← ajjustar · ajsutar · ajusatr · ajusstar · ajustarr · ajustra · ajusttar · ajutsar
  • asustar ← assustar · assutar · asusatr · asusstar · asustarr · asustra · asusttar · asutsar

Frequently Asked Questions

Can "ajustar" and "asustar" be used interchangeably?
No. They are said differently ([axusˈt̪aɾ] versus [asusˈt̪aɾ]) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Which is more common, "ajustar" or "asustar"?
"ajustar" is the more common of the two: it sits at frequency rank #10,257 in our Spanish list, against #16,268 for "asustar". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

  • Full dictionary entry for "ajustar" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "asustar" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #231,201 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "ajustar" and "asustar" also get mixed up with nearby pairs, the highest-scored neighbour is "asustar vs asustaron". 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 #231,201 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list