DenningvsdunningTell them apart

Quick tell: Denning is a name, dunning is a noun, so they fill different roles in a sentence.

Which to use

“Denning” is a name and “dunning” is a noun - they look or sound alike but fill different roles in a sentence.

#42,086
“Denning” frequency rank
#34,865
“dunning” frequency rank
76951
confusion score

Side-by-Side Comparison

Feature Denning dunning
Definition A surname. Attempt to collect a debt.

Letter map: Denning vs dunning

Shared letters muted; letters that set Denning and dunning apart highlighted. Shared run: 6. Denning and dunning follow the identical consonant-vowel pattern (CVCCVCC). Same shape at a glance is often the real trap, independent of shared letters.

7 ch
Denning
7 ch
dunning

Role in the sentence - Denning and dunning

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: Denning is aname and dunninganoun. On the page they differ by a single letter - e in “Denning” becomes u in “dunning”. Our composite confusion score for this pair is 76951, derived from the frequency rank of both members and their visual similarity.

Denning is recorded at frequency rank #42,086, classified as aname. dunning is at rank #34,865, tagged as anoun.

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 76951, this pair ranks #28,662 of 530,003 scored English confusable pairs - among the most confusable pairs.

Orthographic DNA of Denning vs dunning

Shared letters: dgin. Private to "Denning": e. Private to "dunning": u.

"Denning" · 7 letters · shape CVCCVCC  ·  "dunning" · 7 letters · shape CVCCVCC

Known mistypes of this pair

  • Denning ← ddenning · dening · deninng · dennign · denningg · denninng · dennnig · dnening
  • dunning ← ddunning · dnuning · duning · duninng · dunnign · dunningg · dunninng · dunnnig

Frequently Asked Questions

Is swapping "Denning" for "dunning" ever safe?
No - they are not even the same part of speech. "Denning" is a name and "dunning" a noun, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "Denning" vs "dunning" - which ranks higher?
"dunning" is the more common of the two: it sits at frequency rank #34,865 in our English list, against #42,086 for "Denning". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Pair "Denning" vs "dunning" is on the table, pick a follow-up below.

  • Full dictionary entry for "Denning" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "dunning" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #28,662 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "Denning" and "dunning" also get mixed up with nearby pairs, the highest-scored neighbour is "deeming vs Denning". 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 #28,662 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list