Which to use
“arbitrage” is a noun and “arbitrary” is an adjective - they look or sound alike but fill different roles in a sentence.
- #36,432
- “arbitrage” frequency rank
- #8,890
- “arbitrary” frequency rank
- 45322
- confusion score
Side-by-Side Comparison
| Feature | arbitrage | arbitrary |
|---|---|---|
| Definition | A market activity in which a security, commodity, currency or other tradable item is bought in one market and sold simultaneously in another, in order to profit from price differences between the markets. | Based on individual discretion or judgment; not based on any objective distinction, perhaps even made at random. |
Where the eye mixes arbitrage and arbitrary
Muted = shared; highlighted = the visual trap. They share 7 letters in sequence.
Why the eye confuses arbitrage with arbitrary
These two trip readers on the page rather than in the ear: arbitrage is /ˈɑɹbɪˌtɹɑʒ/ while arbitrary is /ˈɑː.bɪ.tɹə.ɹi/. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 45322, derived from the frequency rank of both members and their visual similarity.
arbitrage is recorded at frequency rank #36,432, classified as anoun, pronounced /ˈɑɹbɪˌtɹɑʒ/. arbitrary is at rank #8,890, tagged as anadj, pronounced /ˈɑː.bɪ.tɹə.ɹi/.
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 45322, this pair ranks #222,329 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of arbitrage vs arbitrary
Shared letters: abirt. Private to "arbitrage": eg. Private to "arbitrary": y.
"arbitrage" · 9 letters · shape VCCVCCVCV · "arbitrary" · 9 letters · shape VCCVCCVCV
Known mistypes of this pair
Frequently Asked Questions
Do "arbitrage" and "arbitrary" mean the same thing in a sentence?
Which is more common, "arbitrage" or "arbitrary"?
After this comparison
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "arbitrage" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "arbitrary" - compare definitions side by side with the headword page. Word entry
- This pair ranks #222,329 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "arbitrage" and "arbitrary" also get mixed up with nearby pairs, the highest-scored neighbour is "arbitrage vs Armitage". 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 #222,329 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.