Which to use
“alergia” is a noun and “alerta” is an adjective - they look or sound alike but fill different roles in a sentence.
- #15,267
- “alergia” frequency rank
- #3,378
- “alerta” frequency rank
- 18645
- confusion score
Side-by-Side Comparison
| Feature | alergia | alerta |
|---|---|---|
| Definition | Reacción de defensa exagerada del organismo en contra de diversas sustancias extrañas a él (alérgenos) introducidas por inhalación, ingestion, inyección o contacto con la piel, aun en cantidades mínimas, que pueden consistir en medicamentos (como la penicilina), alimentos (como el huevo), polen o algún producto químico. Esta reacción se manifiesta con síntomas respiratorios, cutáneos o nerviosos, y en casos extremos, puede ser mortal. | Adjetivo invariante en género que denota estado de atención o vigilancia. |
Where the eye mixes alergia and alerta
Muted = shared; highlighted = the visual trap. They share 5 letters in sequence. alergia runs 7 letters (VCVCCVV) against alerta's 6 (VCVCCV) - the length gap alone is often enough to separate them once you know to check it.
Why the eye confuses alergia with alerta
These two trip readers on the page rather than in the ear: alergia is [aˈleɾxja] while alerta is [aˈleɾt̪a]. 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 (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 18645, derived from the frequency rank of both members and their visual similarity.
alergia is recorded at frequency rank #15,267, classified as anoun, pronounced [aˈleɾxja]. alerta is at rank #3,378, tagged as anadj, pronounced [aˈleɾt̪a].
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 18645, this pair ranks #267,051 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of alergia vs alerta
Shared letters: aelr. Private to "alergia": gi. Private to "alerta": t.
"alergia" · 7 letters · shape VCVCCVV · "alerta" · 6 letters · shape VCVCCV
Known mistypes of this pair
Frequently Asked Questions
Do "alergia" and "alerta" mean the same thing in a sentence?
In ordinary Spanish text, does "alergia" or "alerta" show up more?
What to do next
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "alergia" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "alerta" - compare definitions side by side with the headword page. Word entry
- This pair ranks #267,051 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "alergia" and "alerta" also get mixed up with nearby pairs, the highest-scored neighbour is "alergia vs alexia". 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 #267,051 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.