sólovssosWhich spelling fits?

Quick tell: sólo is a adverb, sos is a verb, so they fill different roles in a sentence.

Which to use

“sólo” is an adverb and “sos” is a verb - they look or sound alike but fill different roles in a sentence.

#127
“sólo” frequency rank
#1,331
“sos” frequency rank
1458
confusion score

Side-by-Side Comparison

Feature sólo sos
Definition Grafía alternativa de solo (adverbio). Cada vez que deba entenderse como equivalente de solamente y sea posible la confusión con el adjetivo homónimo, es optativo tildar la palabra para desambiguar. Segunda persona del singular (vos) del presente de indicativo de ser.

Where the eye mixes sólo and sos

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

4 ch
sólo
3 ch
sos

Visual trap between sólo and sos

These two trip readers on the page rather than in the ear: sólo is [ˈsolo] while sos is [ˈsos]. 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 (adverb vs verb), which is usually the fastest check. Our composite confusion score for this pair is 1458, derived from the frequency rank of both members and their visual similarity.

sólo is recorded at frequency rank #127, classified as anadv, pronounced [ˈsolo]. sos is at rank #1,331, tagged as averb, pronounced [ˈsos].

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 1458, this pair ranks #322,024 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of sólo vs sos

Shared letters: os. Private to "sólo": . Private to "sos": -.

"sólo" · 4 letters · shape CVCV  ·  "sos" · 3 letters · shape CVC

Frequently Asked Questions

Can "sólo" and "sos" be used interchangeably?
No - they are not even the same part of speech. "sólo" is an adverb and "sos" a verb, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "sólo" or "sos"?
"sólo" is the more common of the two: it sits at frequency rank #127 in our Spanish list, against #1,331 for "sos". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Useful next steps

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "sólo" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "sos" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #322,024 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "sólo" and "sos" also get mixed up with nearby pairs, the highest-scored neighbour is "sos vs sous". Nearby pair

Confusion rank #322,024 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