Which to use
“impeccable” is an adjective and “impeccably” is an adverb - they look or sound alike but fill different roles in a sentence.
- #20,960
- “impeccable” frequency rank
- #45,444
- “impeccably” frequency rank
- 66404
- confusion score
Side-by-Side Comparison
| Feature | impeccable | impeccably |
|---|---|---|
| Definition | Perfect, without faults, flaws or errors | In a perfect or flawless manner. |
Where the eye mixes impeccable and impeccably
Muted = shared; highlighted = the visual trap. They share 9 letters in sequence. impeccable and impeccably follow the identical consonant-vowel pattern (VCCVCCVCCV). Same shape at a glance is often the real trap, independent of shared letters.
Why the eye confuses impeccable with impeccably
These two trip readers on the page rather than in the ear: impeccable is /ɪmˈpɛkəbəl/ while impeccably is /ɪmˈpɛk.ə.bli/. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - e in “impeccable” becomes y in “impeccably”, and the parts of speech differ too (adjective vs adverb), which is usually the fastest check. Our composite confusion score for this pair is 66404, derived from the frequency rank of both members and their visual similarity.
impeccable is recorded at frequency rank #20,960, classified as anadj, pronounced /ɪmˈpɛkəbəl/. impeccably is at rank #45,444, tagged as anadv, pronounced /ɪmˈpɛk.ə.bli/.
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 66404, this pair ranks #68,164 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of impeccable vs impeccably
Shared letters: abceilmp. Private to "impeccable": -. Private to "impeccably": y.
"impeccable" · 10 letters · shape VCCVCCVCCV · "impeccably" · 10 letters · shape VCCVCCVCCV
Known mistypes of this pair
- impeccable ← imepccable · immpeccable · impcecable · impecable · impecacble · impeccabble · impeccabel · impeccablle
- impeccably ← imepccably · immpeccably · impcecably · impecably · impecacbly · impeccabbly · impeccablly · impeccablyy
Frequently Asked Questions
Can "impeccable" and "impeccably" be used interchangeably?
In ordinary English text, does "impeccable" or "impeccably" show up more?
After this comparison
Eye-level mix-up between "impeccable" and "impeccably" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "impeccable" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "impeccably" - compare definitions side by side with the headword page. Word entry
- This pair ranks #68,164 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "impeccable" and "impeccably" also get mixed up with nearby pairs, the highest-scored neighbour is "impeccable vs implacable". 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 #68,164 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.