Which to use
“truthful” is an adjective and “truthfully” is an adverb - they look or sound alike but fill different roles in a sentence.
- #16,812
- “truthful” frequency rank
- #21,687
- “truthfully” frequency rank
- 38499
- confusion score
Side-by-Side Comparison
| Feature | truthful | truthfully |
|---|---|---|
| Definition | Honest, and always telling the truth. | In a truthful manner |
Where the eye mixes truthful and truthfully
Muted = shared; highlighted = the visual trap. They share 8 letters in sequence.
Look-alike desk: truthful vs truthfully
These two trip readers on the page rather than in the ear: truthful is /ˈtɹuːθ.f(ə)l/ while truthfully is /ˈtɹuːθ.fəl.i/. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 extra letter(s) - “truthful” sits inside “truthfully”, and the parts of speech differ too (adjective vs adverb), which is usually the fastest check. Our composite confusion score for this pair is 38499, derived from the frequency rank of both members and their visual similarity.
truthful is recorded at frequency rank #16,812, classified as anadj, pronounced /ˈtɹuːθ.f(ə)l/. truthfully is at rank #21,687, tagged as anadv, pronounced /ˈtɹuːθ.fəl.i/.
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 38499, this pair ranks #285,398 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of truthful vs truthfully
Shared letters: fhlrtu. Private to "truthful": -. Private to "truthfully": y.
"truthful" · 8 letters · shape CCVCCCVC · "truthfully" · 10 letters · shape CCVCCCVCCV
Known mistypes of this pair
- truthful ← rtuthful · trruthful · trtuhful · truhtful · trutfhul · truthfful · truthflu · truthfull
- truthfully ← rtuthfully · trruthfully · trtuhfully · truhtfully · trutfhully · truthffully · truthfluly · truthfullyy
Frequently Asked Questions
Can "truthful" and "truthfully" be used interchangeably?
In ordinary English text, does "truthful" or "truthfully" show up more?
After this comparison
Eye-level mix-up between "truthful" and "truthfully" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "truthful" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "truthfully" - compare definitions side by side with the headword page. Word entry
- This pair ranks #285,398 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- 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 #285,398 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.