ach vs aro, What's the Difference?

Which to use

“ach” is an intj and “aro” is a noun - they look or sound alike but fill different roles in a sentence.

#48,212
“ach” frequency rank: #22,868
“aro” frequency rank: 71080
confusion score

Side-by-Side Comparison

Feature	ach	aro
Definition	oh	caixilho de madeira para os vãos das portas e janelas

Letter map: ach vs aro

Shared letters muted; letters that set ach and aro apart highlighted. Shared run: 1. ach (VCC) and aro (VCV) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.

3 ch

ach

3 ch

aro

Grammar separator: ach vs aro

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: ach is anintj and aroanoun. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 71080, derived from the frequency rank of both members and their visual similarity.

ach is recorded at frequency rank #48,212, classified as anintj. aro is at rank #22,868, tagged as anoun, pronounced /ˈa.ɾu/.

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 71080, this pair ranks #3,456 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of ach vs aro

Shared letters: a. Private to "ach": ch. Private to "aro": or.

"ach" · 3 letters · shape VCC · "aro" · 3 letters · shape VCV

Frequently Asked Questions

Is swapping "ach" for "aro" ever safe?

No - they are not even the same part of speech. "ach" is an intj and "aro" a noun, so a sentence built for one is usually ungrammatical with the other.

Frequency check: "ach" vs "aro" - which ranks higher?

"aro" is the more common of the two: it sits at frequency rank #22,868 in our Portuguese list, against #48,212 for "ach". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Done with this confusable. These links stay specific to "ach" and "aro".

Full dictionary entry for "ach" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "aro" - compare definitions side by side with the headword page. Word entry
This pair ranks #3,456 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"ach" and "aro" also get mixed up with nearby pairs, the highest-scored neighbour is "ach vs acs". Nearby pair

Confusion rank #3,456 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.