Which to use
“deepen” is a verb and “deeper” is an adjective - they look or sound alike but fill different roles in a sentence.
- #22,639
- “deepen” frequency rank
- #4,295
- “deeper” frequency rank
- 26934
- confusion score
Side-by-Side Comparison
| Feature | deepen | deeper |
|---|---|---|
| Definition | To make deep or deeper | comparative form of deep: more deep |
Where the eye mixes deepen and deeper
Muted = shared; highlighted = the visual trap. They share 5 letters in sequence.
Visual trap between deepen and deeper
These two trip readers on the page rather than in the ear: deepen is /ˈdiːpən/ while deeper is /ˈdipɚ/. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - n in “deepen” becomes r in “deeper”, and the parts of speech differ too (verb vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 26934, derived from the frequency rank of both members and their visual similarity.
deepen is recorded at frequency rank #22,639, classified as averb, pronounced /ˈdiːpən/. deeper is at rank #4,295, tagged as anadj, pronounced /ˈdipɚ/.
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 26934, this pair ranks #382,932 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of deepen vs deeper
Shared letters: dep. Private to "deepen": n. Private to "deeper": r.
"deepen" · 6 letters · shape CVVCVC · "deeper" · 6 letters · shape CVVCVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "deepen" for "deeper" ever safe?
Which is more common, "deepen" or "deeper"?
After this comparison
Eye-level mix-up between "deepen" and "deeper" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "deepen" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "deeper" - compare definitions side by side with the headword page. Word entry
- This pair ranks #382,932 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "deepen" and "deeper" also get mixed up with nearby pairs, the highest-scored neighbour is "dampen vs deepen". 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 #382,932 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.