Which to use
“illusion” and “infusion” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #7,803
- “illusion” frequency rank
- #19,869
- “infusion” frequency rank
- 27672
- confusion score
Side-by-Side Comparison
| Feature | illusion | infusion |
|---|---|---|
| Definition | Anything that seems to be something that it is not. | A product consisting of a liquid which has had other ingredients steeped in it to extract useful qualities. |
Where the eye mixes illusion and infusion
Muted = shared; highlighted = the visual trap. They share 6 letters in sequence. illusion and infusion follow the identical consonant-vowel pattern (VCCVCVVC). Same shape at a glance is often the real trap, independent of shared letters.
Look-alike desk: illusion vs infusion
A purely visual mix-up. illusion (/ɪˈl(j)uːʒ(ə)n/) and infusion (/ɪnˈfjuːʒən/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 27672, derived from the frequency rank of both members and their visual similarity.
illusion is recorded at frequency rank #7,803, classified as anoun, pronounced /ɪˈl(j)uːʒ(ə)n/. infusion is at rank #19,869, tagged as anoun, pronounced /ɪnˈfjuːʒən/.
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 27672, this pair ranks #377,069 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of illusion vs infusion
Shared letters: inosu. Private to "illusion": l. Private to "infusion": f.
"illusion" · 8 letters · shape VCCVCVVC · "infusion" · 8 letters · shape VCCVCVVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "illusion" for "infusion" ever safe?
Frequency check: "illusion" vs "infusion" - which ranks higher?
What to do next
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "illusion" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "infusion" - compare definitions side by side with the headword page. Word entry
- This pair ranks #377,069 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "illusion" and "infusion" also get mixed up with nearby pairs, the highest-scored neighbour is "incursion vs infusion". 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 #377,069 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.