Which to use
“diagnostic” is a noun and “diagnostique” is an adjective - they look or sound alike but fill different roles in a sentence.
- #4,745
- “diagnostic” frequency rank
- #21,594
- “diagnostique” frequency rank
- 26339
- confusion score
Side-by-Side Comparison
| Feature | diagnostic | diagnostique |
|---|---|---|
| Definition | Partie de la médecine qui a pour objet la distinction des maladies, l'identification d’une maladie à partir de symptômes. | Qui sert à établir le diagnostic d’une maladie. |
Same sound, different letters: diagnostic vs diagnostique
Muted letters are shared; highlighted letters are the only spelling cue when pronunciation matches. Shared run: 9 letters. diagnostic runs 10 letters (CVVCCVCCVC) against diagnostique's 12 (CVVCCVCCVCVV) - the length gap alone is often enough to separate them once you know to check it.
Homophone desk: diagnostic vs diagnostique
Say them out loud and nothing separates them: diagnostic and diagnostique carry the same recorded pronunciation, \djaɡ.nɔs.tik\. Grammar is what tells them apart: one is anoun, the other anadjective, so most sentences will only accept one of them. They differ by 2 letter(s) in length. Our composite confusion score for this pair is 26339, derived from the frequency rank of both members and their visual similarity.
diagnostic is recorded at frequency rank #4,745, classified as anoun, pronounced \djaɡ.nɔs.tik\. diagnostique is at rank #21,594, tagged as anadj, pronounced \djaɡ.nɔs.tik\.
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 26339, this pair ranks #335,627 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of diagnostic vs diagnostique
Shared letters: adginost. Private to "diagnostic": c. Private to "diagnostique": equ.
"diagnostic" · 10 letters · shape CVVCCVCCVC · "diagnostique" · 12 letters · shape CVVCCVCCVCVV
Known mistypes of this pair
- diagnostic ← daignostic · ddiagnostic · diaggnostic · diagnnostic · diagnositc · diagnosstic · diagnostci · diagnosticc
- diagnostique ← daignostique · ddiagnostique · diaggnostique · diagnnostique · diagnositque · diagnosstique · diagnostiqeu · diagnostiqque
Frequently Asked Questions
Is swapping "diagnostic" for "diagnostique" ever safe?
Which is more common, "diagnostic" or "diagnostique"?
Useful next steps
You've separated the homophone pair "diagnostic" / "diagnostique". Follow the links when you need the full entry or a neighbour that trips the same ear.
- Full dictionary entry for "diagnostic" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "diagnostique" - compare definitions side by side with the headword page. Word entry
- This pair ranks #335,627 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "diagnostic" and "diagnostique" also get mixed up with nearby pairs, the highest-scored neighbour is "diagnostique vs diagnostiqués". 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 #335,627 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.