Which to use
“rational” and “rationalen” are a confusable German pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #16,522
- “rational” frequency rank
- #22,112
- “rationalen” frequency rank
- 38634
- confusion score
Side-by-Side Comparison
| Feature | rational | rationalen |
|---|---|---|
| Definition | mit dem Verstand, der Vernunft zu tun habend | Genitiv Singular Maskulinum der starken Deklination des Positivs des Adjektivs rational |
Where the eye mixes rational and rationalen
Muted = shared; highlighted = the visual trap. They share 8 letters in sequence.
Why the eye confuses rational with rationalen
A purely visual mix-up. rational ([ˌʁat͡si̯oˈnaːl]) and rationalen ([ˌʁat͡si̯oˈnaːlən]) 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 extra letter(s) - “rational” sits inside “rationalen”. Our composite confusion score for this pair is 38634, derived from the frequency rank of both members and their visual similarity.
rational is recorded at frequency rank #16,522, classified as anadj, pronounced [ˌʁat͡si̯oˈnaːl]. rationalen is at rank #22,112, tagged as anadj, pronounced [ˌʁat͡si̯oˈnaːlən].
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 38634, this pair ranks #1,558,734 of 2,006,359 scored German confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of rational vs rationalen
Shared letters: ailnort. Private to "rational": -. Private to "rationalen": e.
"rational" · 8 letters · shape CVCVVCVC · "rationalen" · 10 letters · shape CVCVVCVCVC
Known mistypes of this pair
- rational ← artional · raitonal · ratinoal · ratioanl · rationall · rationla · rationnal · ratoinal
- rationalen ← artionalen · raitonalen · ratinoalen · ratioanlen · rationaeln · rationalenn · rationallen · rationalne
Frequently Asked Questions
Can "rational" and "rationalen" be used interchangeably?
Frequency check: "rational" vs "rationalen" - which ranks higher?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "rational" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "rationalen" - compare definitions side by side with the headword page. Word entry
- This pair ranks #1,558,734 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
- "rational" and "rationalen" also get mixed up with nearby pairs, the highest-scored neighbour is "rationalen vs rationaler". 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 #1,558,734 of 2,006,359 scored German pairs, corpus vintage 2026-09-03, not spelling advice.