Which to use
“then” is an adverb and “this” is an adjective - they look or sound alike but fill different roles in a sentence.
- #23,392
- “then” frequency rank
- #5,196
- “this” frequency rank
- 28588
- confusion score
Side-by-Side Comparison
| Feature | then | this |
|---|---|---|
| Definition | (Adverbe conjonctif) Alors, dans ce cas, par conséquence. | Ce … -ci, cette … -ci. |
Where the eye mixes then and this
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Visual trap between then and this
These two trip readers on the page rather than in the ear: then is \ˈðɛn\ while this is \ðɪs\. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (adverb vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 28588, derived from the frequency rank of both members and their visual similarity.
then is recorded at frequency rank #23,392, classified as anadv, pronounced \ˈðɛn\. this is at rank #5,196, tagged as anadj, pronounced \ðɪs\.
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 28588, this pair ranks #321,872 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of then vs this
Shared letters: ht. Private to "then": en. Private to "this": is.
"then" · 4 letters · shape CCVC · "this" · 4 letters · shape CCVC
Known mistypes of this pair
Frequently Asked Questions
Can "then" and "this" be used interchangeably?
Which is more common, "then" or "this"?
Useful next steps
Eye-level mix-up between "then" and "this" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "then" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "this" - compare definitions side by side with the headword page. Word entry
- This pair ranks #321,872 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "then" and "this" also get mixed up with nearby pairs, the highest-scored neighbour is "then vs tun". 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 #321,872 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.