armvsasíTell them apart

Quick tell: arm is a noun, así is an adverb, so they fill different roles in a sentence.

Which to use

“arm” is a noun and “así” is an adverb - they look or sound alike but fill different roles in a sentence.

#35,354
“arm” frequency rank
#55
“así” frequency rank
35409
confusion score

Side-by-Side Comparison

Feature arm así
Definition Brazo. De este modo o forma.

Where the eye mixes arm and así

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

3 ch
arm
3 ch
así

Visual trap between arm and así

These two trip readers on the page rather than in the ear: arm is /ɑːm/ while así is [aˈsi]. 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 adverb), which is usually the fastest check. Our composite confusion score for this pair is 35409, derived from the frequency rank of both members and their visual similarity.

arm is recorded at frequency rank #35,354, classified as anoun, pronounced /ɑːm/. así is at rank #55, tagged as anadv, pronounced [aˈsi].

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 35409, this pair ranks #186,252 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of arm vs así

Shared letters: a. Private to "arm": mr. Private to "así": .

"arm" · 3 letters · shape VCC  ·  "así" · 3 letters · shape VCV

Frequently Asked Questions

Is swapping "arm" for "así" ever safe?
No - they are not even the same part of speech. "arm" is a noun and "así" an adverb, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "arm" or "así"?
"así" is the more common of the two: it sits at frequency rank #55 in our Spanish list, against #35,354 for "arm". 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 "arm" and "así" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "arm" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "así" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #186,252 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "arm" and "así" also get mixed up with nearby pairs, the highest-scored neighbour is "arm vs atl". Nearby pair

Confusion rank #186,252 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