Which to use
“ar” is a noun and “arch” is a verb - they look or sound alike but fill different roles in a sentence.
- #613
- “ar” frequency rank
- #35,879
- “arch” frequency rank
- 36492
- confusion score
Side-by-Side Comparison
| Feature | ar | arch |
|---|---|---|
| Definition | fluido gasoso que envolve todo o planeta Terra; atmosfera | arquear, tomar a forma de um arco |
Letter map: ar vs arch
Shared letters muted; letters that set ar and arch apart highlighted. Shared run: 2.
Grammar separator: ar vs arch
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: ar is anoun and archaverb. On the page they differ by 2 extra letter(s) - “ar” sits inside “arch”. Our composite confusion score for this pair is 36492, derived from the frequency rank of both members and their visual similarity.
ar is recorded at frequency rank #613, classified as anoun. 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 36492, this pair ranks #30,307 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of ar vs arch
Shared letters: ar. Private to "ar": -. Private to "arch": ch.
"ar" · 2 letters · shape VC · "arch" · 4 letters · shape VCCC
Known mistypes of this pair
- arch ← acrh · arcch · archh · arhc · arrch · rach
Frequently Asked Questions
Do "ar" and "arch" mean the same thing in a sentence?
Which is more common, "ar" or "arch"?
After this comparison
Pair "ar" vs "arch" is on the table, pick a follow-up below.
- Full dictionary entry for "ar" 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 #30,307 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "ar" 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 #30,307 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.