airvsarcWhich spelling fits?

Which to use

“air” and “arc” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#341
“air” frequency rank
#3,180
“arc” frequency rank
3521
confusion score

Side-by-Side Comparison

Feature air arc
Definition Mélange gazeux constituant l’atmosphère. Arme de trait servant à lancer des flèches, formée d’une branche de bois ou d’une verge, soit de métal, soit d’autre matière, courbée avec effort au moyen d’une corde qui s’attache aux deux extrémités.

Where the eye mixes air and arc

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

3 ch
air
3 ch
arc

Why the eye confuses air with arc

A purely visual mix-up. air (\ɛʁ\) and arc (\aʁk\) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 3521, derived from the frequency rank of both members and their visual similarity.

air is recorded at frequency rank #341, classified as anoun, pronounced \ɛʁ\. arc is at rank #3,180, tagged as anoun, pronounced \aʁk\.

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 3521, this pair ranks #433,827 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of air vs arc

Shared letters: ar. Private to "air": i. Private to "arc": c.

"air" · 3 letters · shape VVC  ·  "arc" · 3 letters · shape VCC

Frequently Asked Questions

Is swapping "air" for "arc" ever safe?
No. They are said differently (\ɛʁ\ versus \aʁk\) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Which is more common, "air" or "arc"?
"air" is the more common of the two: it sits at frequency rank #341 in our French list, against #3,180 for "arc". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "air" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "arc" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #433,827 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "air" and "arc" also get mixed up with nearby pairs, the highest-scored neighbour is "arc vs aur". Nearby pair

Confusion rank #433,827 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list