cápsulavscúpulaWhich spelling fits?

Which to use

“cápsula” and “cúpula” are a confusable Portuguese pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#11,245
“cápsula” frequency rank
#6,633
“cúpula” frequency rank
17878
confusion score

Side-by-Side Comparison

Feature cápsula cúpula
Definition um fruto seco composto por mais de um carpelo a parte côncava de um zimbório

Where the eye mixes cápsula and cúpula

Muted = shared; highlighted = the visual trap. They share 5 letters in sequence. cápsula runs 7 letters (CVCCVCV) against cúpula's 6 (CVCVCV) - the length gap alone is often enough to separate them once you know to check it.

7 ch
cápsula
6 ch
cúpula

Visual trap between cápsula and cúpula

A purely visual mix-up. cápsula (/ˈka.psu.lɐ/) and cúpula (/ˈku.pu.lɐ/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 17878, derived from the frequency rank of both members and their visual similarity.

cápsula is recorded at frequency rank #11,245, classified as anoun, pronounced /ˈka.psu.lɐ/. cúpula is at rank #6,633, tagged as anoun, pronounced /ˈku.pu.lɐ/.

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 17878, this pair ranks #53,255 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of cápsula vs cúpula

Shared letters: aclpu. Private to "cápsula": sá. Private to "cúpula": ú.

"cápsula" · 7 letters · shape CVCCVCV  ·  "cúpula" · 6 letters · shape CVCVCV

Frequently Asked Questions

Can "cápsula" and "cúpula" be used interchangeably?
No. They are said differently (/ˈka.psu.lɐ/ versus /ˈku.pu.lɐ/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
In ordinary Portuguese text, does "cápsula" or "cúpula" show up more?
"cúpula" is the more common of the two: it sits at frequency rank #6,633 in our Portuguese list, against #11,245 for "cápsula". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Eye-level mix-up between "cápsula" and "cúpula" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "cápsula" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "cúpula" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #53,255 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "cápsula" and "cúpula" also get mixed up with nearby pairs, the highest-scored neighbour is "cápsula vs casulo". Nearby pair

Confusion rank #53,255 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