zelovszelosoWhich spelling fits?

Quick tell: zelo is a noun, zeloso is an adjective, so they fill different roles in a sentence.

Which to use

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

#22,503
“zelo” frequency rank
#43,228
“zeloso” frequency rank
65731
confusion score

Side-by-Side Comparison

Feature zelo zeloso
Definition dedicação ardente, afeição íntima, desvelo, cuidado, interesse que tem zelo

Where the eye mixes zelo and zeloso

Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. zelo runs 4 letters (CVCV) against zeloso's 6 (CVCVCV) - the length gap alone is often enough to separate them once you know to check it.

4 ch
zelo
6 ch
zeloso

Visual trap between zelo and zeloso

These two trip readers on the page rather than in the ear: zelo is /ˈze.lu/ while zeloso is /zɨ.ˈlo.zu/. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 extra letter(s) - “zelo” sits inside “zeloso”, and the parts of speech differ too (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 65731, derived from the frequency rank of both members and their visual similarity.

zelo is recorded at frequency rank #22,503, classified as anoun, pronounced /ˈze.lu/. zeloso is at rank #43,228, tagged as anadj, pronounced /zɨ.ˈlo.zu/.

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 65731, this pair ranks #5,269 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of zelo vs zeloso

Shared letters: eloz. Private to "zelo": -. Private to "zeloso": s.

"zelo" · 4 letters · shape CVCV  ·  "zeloso" · 6 letters · shape CVCVCV

Known mistypes of this pair

  • zelo ← ezlo · zello · zeol · zleo · zzelo
  • zeloso ← ezloso · zelloso · zeloos · zelosso · zelsoo · zeolso · zleoso · zzeloso

Frequently Asked Questions

Can "zelo" and "zeloso" be used interchangeably?
No - they are not even the same part of speech. "zelo" is a noun and "zeloso" an adjective, so a sentence built for one is usually ungrammatical with the other.
In ordinary Portuguese text, does "zelo" or "zeloso" show up more?
"zelo" is the more common of the two: it sits at frequency rank #22,503 in our Portuguese list, against #43,228 for "zeloso". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

  • Full dictionary entry for "zelo" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "zeloso" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #5,269 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "zelo" and "zeloso" also get mixed up with nearby pairs, the highest-scored neighbour is "zelar vs zelo". 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 #5,269 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