atovsátomoWhat's the difference?

Which to use

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

#1,326
“ato” frequency rank
#21,055
“átomo” frequency rank
22381
confusion score

Side-by-Side Comparison

Feature ato átomo
Definition processo de fazer algo; manifestação real e tangível menor partícula em que se pode dividir um elemento, exibindo ainda todas as características típicas do comportamento químico desse elemento

Where the eye mixes ato and átomo

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. ato runs 3 letters (VCV) against átomo's 5 (VCVCV) - the length gap alone is often enough to separate them once you know to check it.

3 ch
ato
5 ch
átomo

Why the eye confuses ato with átomo

A purely visual mix-up. ato (/ˈato/ ou /ˈatu/_(plural:) /ˈatos/, /ˈatus/ ou /ˈatuʃ/) and átomo (/ˈa.tu.mu/) 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 2 letter(s) in length. Our composite confusion score for this pair is 22381, derived from the frequency rank of both members and their visual similarity.

ato is recorded at frequency rank #1,326, classified as anoun, pronounced /ˈato/ ou /ˈatu/_(plural:) /ˈatos/, /ˈatus/ ou /ˈatuʃ/. átomo is at rank #21,055, tagged as anoun, pronounced /ˈa.tu.mu/.

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 22381, this pair ranks #47,674 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of ato vs átomo

Shared letters: ot. Private to "ato": a. Private to "átomo": má.

"ato" · 3 letters · shape VCV  ·  "átomo" · 5 letters · shape VCVCV

Frequently Asked Questions

Can "ato" and "átomo" be used interchangeably?
No. They are said differently (/ˈato/ ou /ˈatu/_(plural:) /ˈatos/, /ˈatus/ ou /ˈatuʃ/ versus /ˈa.tu.mu/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
In ordinary Portuguese text, does "ato" or "átomo" show up more?
"ato" is the more common of the two: it sits at frequency rank #1,326 in our Portuguese list, against #21,055 for "átomo". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

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

  • Full dictionary entry for "ato" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "átomo" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #47,674 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "ato" and "átomo" also get mixed up with nearby pairs, the highest-scored neighbour is "álamo vs átomo". Nearby pair

Confusion rank #47,674 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