açovsarchWhat's the difference?

Quick tell: aço is a noun, arch is a verb, so they fill different roles in a sentence.

Which to use

“aço” is a noun and “arch” is a verb - they look or sound alike but fill different roles in a sentence.

#4,209
“aço” frequency rank
#35,879
“arch” frequency rank
40088
confusion score

Side-by-Side Comparison

Feature aço arch
Definition liga composta principalmente de ferro e carbono utilizada para a fabricação de utensílios, armas, veículos e uma infinidade de outros objetos da vida moderna arquear, tomar a forma de um arco

Letter map: aço vs arch

Shared letters muted; letters that set aço and arch apart highlighted. Shared run: 1.

3 ch
aço
4 ch
arch

Grammar separator: aço vs arch

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: aço is anoun and archaverb. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 40088, derived from the frequency rank of both members and their visual similarity.

aço is recorded at frequency rank #4,209, classified as anoun, pronounced /ˈa.su/. arch is at rank #35,879, tagged as averb.

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 40088, this pair ranks #26,072 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of aço vs arch

Shared letters: a. Private to "aço": . Private to "arch": chr.

"aço" · 3 letters · shape VCV  ·  "arch" · 4 letters · shape VCCC

Known mistypes of this pair

  • archacrh · arcch · archh · arhc · arrch · rach

Frequently Asked Questions

Is swapping "aço" for "arch" ever safe?
No - they are not even the same part of speech. "aço" is a noun and "arch" a verb, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "aço" vs "arch" - which ranks higher?
"aço" is the more common of the two: it sits at frequency rank #4,209 in our Portuguese list, against #35,879 for "arch". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Pair "aço" vs "arch" is on the table, pick a follow-up below.

  • Full dictionary entry for "aço" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "arch" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #26,072 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "aço" and "arch" also get mixed up with nearby pairs, the highest-scored neighbour is "acs vs arch". 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 #26,072 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