sériovssítioWhat's the difference?

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

Which to use

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

#544
“sério” frequency rank
#1,908
“sítio” frequency rank
2452
confusion score

Side-by-Side Comparison

Feature sério sítio
Definition que demonstra profundo pensar lugar; local; localidade; povoação

Where the eye mixes sério and sítio

Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.

5 ch
sério
5 ch
sítio

Why the eye confuses sério with sítio

These two trip readers on the page rather than in the ear: sério is /ˈsɛ.ɾju/ while sítio is /ˈsi.tju/. 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 2452, derived from the frequency rank of both members and their visual similarity.

sério is recorded at frequency rank #544, classified as anadj, pronounced /ˈsɛ.ɾju/. sítio is at rank #1,908, tagged as anoun, pronounced /ˈsi.tju/.

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 2452, this pair ranks #72,939 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of sério vs sítio

Shared letters: ios. Private to "sério": . Private to "sítio": .

"sério" · 5 letters · shape CVCVV  ·  "sítio" · 5 letters · shape CVCVV

Frequently Asked Questions

Do "sério" and "sítio" mean the same thing in a sentence?
No - they are not even the same part of speech. "sério" is an adjective and "sítio" a noun, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "sério" vs "sítio" - which ranks higher?
"sério" is the more common of the two: it sits at frequency rank #544 in our Portuguese list, against #1,908 for "sítio". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

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 "sério" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "sítio" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #72,939 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "sério" and "sítio" also get mixed up with nearby pairs, the highest-scored neighbour is "seno vs sério". Nearby pair

Confusion rank #72,939 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list