Which to use
“HDR” and “hydra” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #41,326
- “HDR” frequency rank
- #34,122
- “hydra” frequency rank
- 75448
- confusion score
Side-by-Side Comparison
| Feature | HDR | hydra |
|---|---|---|
| Definition | Diplôme de plus haut niveau universitaire, requis pour postuler au professorat des universités ou à la direction de recherche. | Hydre, en particulier l'Hydre de Lerne. |
Where the eye mixes HDR and hydra
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Why the eye confuses HDR with hydra
A purely visual mix-up. HDR (\aʃ.de.ɛʁ\) and hydra (\ˈhy.dra\) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 2 letter(s) in length. Our composite confusion score for this pair is 75448, derived from the frequency rank of both members and their visual similarity.
HDR is recorded at frequency rank #41,326, classified as anoun, pronounced \aʃ.de.ɛʁ\. hydra is at rank #34,122, tagged as anoun, pronounced \ˈhy.dra\.
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 75448, this pair ranks #34,075 of 440,172 scored French confusable pairs - among the most confusable pairs.
Orthographic DNA of HDR vs hydra
Shared letters: dhr. Private to "HDR": -. Private to "hydra": ay.
"HDR" · 3 letters · shape CCC · "hydra" · 5 letters · shape CVCCV
Known mistypes of this pair
- hydra ← hdyra · hhydra · hydar · hyddra · hydrra · hyrda · hyydra · yhdra
Frequently Asked Questions
Is swapping "HDR" for "hydra" ever safe?
Frequency check: "HDR" vs "hydra" - which ranks higher?
Useful next steps
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "HDR" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "hydra" - compare definitions side by side with the headword page. Word entry
- This pair ranks #34,075 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "HDR" and "hydra" also get mixed up with nearby pairs, the highest-scored neighbour is "hae vs HDR". 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 #34,075 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.