Which to use
“ips” is a symbol and “ISF” is a name - they look or sound alike but fill different roles in a sentence.
- #38,871
- “ips” frequency rank
- #17,462
- “ISF” frequency rank
- 56333
- confusion score
Side-by-Side Comparison
| Feature | ips | ISF |
|---|---|---|
| Definition | Unité de mesure de la fréquence d’échantillonnage d’un film : nombre d’images qui défilent par seconde. | Impôt déclaratif payé par les personnes physiques, célibataires ou en couple, possédant un patrimoine imposable dont la valeur nette est supérieure à un seuil fixé par la loi. |
Where the eye mixes ips and ISF
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Visual trap between ips and ISF
These two trip readers on the page rather than in the ear: ips is \i.pe.ɛs\ while ISF is \i ɛ.s‿ɛf\. 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 (symbol vs name), which is usually the fastest check. Our composite confusion score for this pair is 56333, derived from the frequency rank of both members and their visual similarity.
ips is recorded at frequency rank #38,871, classified as asymbol, pronounced \i.pe.ɛs\. ISF is at rank #17,462, tagged as aname, pronounced \i ɛ.s‿ɛf\.
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 56333, this pair ranks #121,741 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of ips vs ISF
Shared letters: is. Private to "ips": p. Private to "ISF": f.
"ips" · 3 letters · shape VCC · "ISF" · 3 letters · shape VCC
Frequently Asked Questions
Is swapping "ips" for "ISF" ever safe?
Frequency check: "ips" vs "ISF" - which ranks higher?
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 "ips" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "ISF" - compare definitions side by side with the headword page. Word entry
- This pair ranks #121,741 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "ips" and "ISF" also get mixed up with nearby pairs, the highest-scored neighbour is "ips vs isi". Nearby pair
Confusion rank #121,741 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.