Which to use
“tonic” is an adjective and “topic” is a noun - they look or sound alike but fill different roles in a sentence.
- #45,350
- “tonic” frequency rank
- #18,609
- “topic” frequency rank
- 63959
- confusion score
Side-by-Side Comparison
| Feature | tonic | topic |
|---|---|---|
| Definition | Tonique, qualifie la première note d’un ton. | Fil de discussion sur un forum internet ; suite de messages consécutifs autour d'un sujet donné regroupés grâce à une interface qui en facilite la lecture. |
Where the eye mixes tonic and topic
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence.
Why the eye confuses tonic with topic
These two trip readers on the page rather than in the ear: tonic is \tuˈnik\ while topic is \tɔ.pik\. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - n in “tonic” becomes p in “topic”, and the parts of speech differ too (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 63959, derived from the frequency rank of both members and their visual similarity.
tonic is recorded at frequency rank #45,350, classified as anadj, pronounced \tuˈnik\. topic is at rank #18,609, tagged as anoun, pronounced \tɔ.pik\.
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 63959, this pair ranks #79,355 of 440,172 scored French confusable pairs - among the most confusable pairs.
Orthographic DNA of tonic vs topic
Shared letters: ciot. Private to "tonic": n. Private to "topic": p.
"tonic" · 5 letters · shape CVCVC · "topic" · 5 letters · shape CVCVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "tonic" for "topic" ever safe?
Frequency check: "tonic" vs "topic" - which ranks higher?
What to do next
Eye-level mix-up between "tonic" and "topic" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "tonic" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "topic" - compare definitions side by side with the headword page. Word entry
- This pair ranks #79,355 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "tonic" and "topic" also get mixed up with nearby pairs, the highest-scored neighbour is "tonic vs toxic". 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 #79,355 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.