Which to use
“thermal” is an adjective and “thermally” is an adverb - they look or sound alike but fill different roles in a sentence.
- #6,749
- “thermal” frequency rank
- #42,947
- “thermally” frequency rank
- 49696
- confusion score
Side-by-Side Comparison
| Feature | thermal | thermally |
|---|---|---|
| Definition | Pertaining to heat or temperature. | Regarding heat. |
Letter map: thermal vs thermally
Shared letters muted; letters that set thermal and thermally apart highlighted. Shared run: 7.
Role in the sentence - thermal and thermally
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: thermal is anadjective and thermallyanadverb. On the page they differ by 2 extra letter(s) - “thermal” sits inside “thermally”. Our composite confusion score for this pair is 49696, derived from the frequency rank of both members and their visual similarity.
thermal is recorded at frequency rank #6,749, classified as anadj, pronounced /ˈθɜːməl/. thermally is at rank #42,947, tagged as anadv.
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 49696, this pair ranks #181,194 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of thermal vs thermally
Shared letters: aehlmrt. Private to "thermal": -. Private to "thermally": y.
"thermal" · 7 letters · shape CCVCCVC · "thermally" · 9 letters · shape CCVCCVCCV
Known mistypes of this pair
Frequently Asked Questions
Can "thermal" and "thermally" be used interchangeably?
Which is more common, "thermal" or "thermally"?
After this comparison
Done with this confusable. These links stay specific to "thermal" and "thermally".
- Full dictionary entry for "thermal" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "thermally" - compare definitions side by side with the headword page. Word entry
- This pair ranks #181,194 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "thermal" and "thermally" also get mixed up with nearby pairs, the highest-scored neighbour is "thermal vs thermos". 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 #181,194 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.