Which to use
“rationality” is a noun and “rationally” is an adverb - they look or sound alike but fill different roles in a sentence.
- #25,544
- “rationality” frequency rank
- #26,220
- “rationally” frequency rank
- 51764
- confusion score
Side-by-Side Comparison
| Feature | rationality | rationally |
|---|---|---|
| Definition | The quality or state of being rational; due exercise of reason; reasonableness. | In a rational manner |
Letter map: rationality vs rationally
Shared letters muted; letters that set rationality and rationally apart highlighted. Shared run: 9.
Grammar separator: rationality vs rationally
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: rationality is anoun and rationallyanadverb. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 51764, derived from the frequency rank of both members and their visual similarity.
rationality is recorded at frequency rank #25,544, classified as anoun. rationally is at rank #26,220, tagged as anadv.
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 51764, this pair ranks #162,740 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of rationality vs rationally
Shared letters: ailnorty. Private to "rationality": -. Private to "rationally": -.
"rationality" · 11 letters · shape CVCVVCVCVCV · "rationally" · 10 letters · shape CVCVVCVCCV
Known mistypes of this pair
- rationality ← artionality · raitonality · ratinoality · ratioanlity · rationailty · rationalitty · rationalityy · rationaliyt
- rationally ← artionally · raitonally · ratinoally · ratioanlly · rationallyy · rationaly · rationalyl · rationlaly
Frequently Asked Questions
Is swapping "rationality" for "rationally" ever safe?
In ordinary English text, does "rationality" or "rationally" show up more?
After this comparison
Pair "rationality" vs "rationally" is on the table, pick a follow-up below.
- Full dictionary entry for "rationality" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "rationally" - compare definitions side by side with the headword page. Word entry
- This pair ranks #162,740 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "rationality" and "rationally" also get mixed up with nearby pairs, the highest-scored neighbour is "rationalist vs rationality". 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 #162,740 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.