Which to use
“highly” is an adverb and “hilly” is an adjective - they look or sound alike but fill different roles in a sentence.
- #1,367
- “highly” frequency rank
- #23,300
- “hilly” frequency rank
- 24667
- confusion score
Side-by-Side Comparison
| Feature | highly | hilly |
|---|---|---|
| Definition | In a high or esteemed manner. | Abundant in hills; having many hills. |
Where the eye mixes highly and hilly
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence.
Visual trap between highly and hilly
These two trip readers on the page rather than in the ear: highly is /ˈhaɪli/ while hilly is /ˈhɪli/. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (adverb vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 24667, derived from the frequency rank of both members and their visual similarity.
highly is recorded at frequency rank #1,367, classified as anadv, pronounced /ˈhaɪli/. hilly is at rank #23,300, tagged as anadj, pronounced /ˈhɪli/.
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 24667, this pair ranks #400,292 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of highly vs hilly
Shared letters: hily. Private to "highly": g. Private to "hilly": -.
"highly" · 6 letters · shape CVCCCV · "hilly" · 5 letters · shape CVCCV
Known mistypes of this pair
Frequently Asked Questions
Is swapping "highly" for "hilly" ever safe?
Which is more common, "highly" or "hilly"?
After this comparison
Eye-level mix-up between "highly" and "hilly" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "highly" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "hilly" - compare definitions side by side with the headword page. Word entry
- This pair ranks #400,292 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "highly" and "hilly" also get mixed up with nearby pairs, the highest-scored neighbour is "hilly vs holla". 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 #400,292 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.