Which to use
“arão” is a noun and “árduo” is an adjective - they look or sound alike but fill different roles in a sentence.
- #30,004
- “arão” frequency rank
- #22,504
- “árduo” frequency rank
- 52508
- confusion score
Side-by-Side Comparison
| Feature | arão | árduo |
|---|---|---|
| Definition | ave marinha, airo, também chamado arau-comum, Uria aalge | de difícil acesso |
Where the eye mixes arão and árduo
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. arão runs 4 letters (VCVV) against árduo's 5 (VCCVV) - the length gap alone is often enough to separate them once you know to check it.
Look-alike desk: arão vs árduo
These two trip readers on the page rather than in the ear: arão is Singular: /ɐ.'ɾaŋ/, /ɐ.'ɾa.o/, /ɐ.'ɾaw/ while árduo is /ˈaɾ.dwu/. 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 (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 52508, derived from the frequency rank of both members and their visual similarity.
arão is recorded at frequency rank #30,004, classified as anoun, pronounced Singular: /ɐ.'ɾaŋ/, /ɐ.'ɾa.o/, /ɐ.'ɾaw/. árduo is at rank #22,504, tagged as anadj, pronounced /ˈaɾ.dwu/.
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 52508, this pair ranks #12,710 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.
Orthographic DNA of arão vs árduo
Shared letters: or. Private to "arão": aã. Private to "árduo": duá.
"arão" · 4 letters · shape VCVV · "árduo" · 5 letters · shape VCCVV
Frequently Asked Questions
Can "arão" and "árduo" be used interchangeably?
In ordinary Portuguese text, does "arão" or "árduo" show up more?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "arão" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "árduo" - compare definitions side by side with the headword page. Word entry
- This pair ranks #12,710 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "arão" and "árduo" also get mixed up with nearby pairs, the highest-scored neighbour is "arão vs atar". Nearby pair
Confusion rank #12,710 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.