armónicovsarsénicoTell them apart

Quick tell: armónico is a adjective, arsénico is a noun, so they fill different roles in a sentence.

Which to use

“armónico” is an adjective and “arsénico” is a noun - they look or sound alike but fill different roles in a sentence.

#30,762
“armónico” frequency rank
#28,240
“arsénico” frequency rank
59002
confusion score

Side-by-Side Comparison

Feature armónico arsénico
Definition Que tiene o esta relacionado con la armonía. El arsénico es un elemento químico de la tabla periódica de los elementos cuyo símbolo es As y el número atómico es 33. En la tabla periódica de los elementos se encuentra en el quinto grupo principal. Arsénico se presenta raramente sólido, principalmente en forma de sulfuros.

Where the eye mixes armónico and arsénico

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

8 ch
armónico
8 ch
arsénico

Visual trap between armónico and arsénico

These two trip readers on the page rather than in the ear: armónico is [aɾˈmoniko] while arsénico is [aɾˈseniko]. 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 (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 59002, derived from the frequency rank of both members and their visual similarity.

armónico is recorded at frequency rank #30,762, classified as anadj, pronounced [aɾˈmoniko]. arsénico is at rank #28,240, tagged as anoun, pronounced [aɾˈseniko].

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 59002, this pair ranks #64,293 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.

Orthographic DNA of armónico vs arsénico

Shared letters: acinor. Private to "armónico": mó. Private to "arsénico": sé.

"armónico" · 8 letters · shape VCCVCVCV  ·  "arsénico" · 8 letters · shape VCCVCVCV

Frequently Asked Questions

Is swapping "armónico" for "arsénico" ever safe?
No - they are not even the same part of speech. "armónico" is an adjective and "arsénico" a noun, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "armónico" or "arsénico"?
"arsénico" is the more common of the two: it sits at frequency rank #28,240 in our Spanish list, against #30,762 for "armónico". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

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

  • Full dictionary entry for "armónico" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "arsénico" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #64,293 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "armónico" and "arsénico" also get mixed up with nearby pairs, the highest-scored neighbour is "armónico vs armónicos". Nearby pair

Confusion rank #64,293 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