psivspubWhich spelling fits?

Which to use

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

#29,927
“psi” frequency rank
#2,638
“pub” frequency rank
32565
confusion score

Side-by-Side Comparison

Feature psi pub
Definition ψ, Ψ, vingt-troisième lettre et dix-septième consonne de l’alphabet grec. Message publicitaire.

Where the eye mixes psi and pub

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

3 ch
psi
3 ch
pub

Look-alike desk: psi vs pub

A purely visual mix-up. psi (\psi\) and pub (\pyb\) 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 32565, derived from the frequency rank of both members and their visual similarity.

psi is recorded at frequency rank #29,927, classified as anoun, pronounced \psi\. pub is at rank #2,638, tagged as anoun, pronounced \pyb\.

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 32565, this pair ranks #296,426 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of psi vs pub

Shared letters: p. Private to "psi": is. Private to "pub": bu.

"psi" · 3 letters · shape CCV  ·  "pub" · 3 letters · shape CVC

Frequently Asked Questions

Can "psi" and "pub" be used interchangeably?
No. They are said differently (\psi\ versus \pyb\) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Which is more common, "psi" or "pub"?
"pub" is the more common of the two: it sits at frequency rank #2,638 in our French list, against #29,927 for "psi". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

What to do next

Eye-level mix-up between "psi" and "pub" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "psi" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "pub" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #296,426 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "psi" and "pub" also get mixed up with nearby pairs, the highest-scored neighbour is "pio vs psi". Nearby pair

Confusion rank #296,426 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