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 spellings diverge
Shared letters are muted; the letters that actually set impeccable and impeccably apart are highlighted. They share 9 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
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
Frequency comparison
Frequently Asked Questions
Can "impeccable" and "impeccably" be used interchangeably?
Which is more common, "impeccable" or "impeccably"?
Remembering impeccable vs impeccably
The fastest way to pick the right one every time.
- Check the role first: if you need an adjective, it's “impeccable”; for an adverb, it's “impeccably”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “impeccable” entry
- Browse more pairs most likely to be confused. Most confusable