Which to use
“infection” and “injection” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #4,093
- “infection” frequency rank
- #7,238
- “injection” frequency rank
- 11331
- confusion score
Side-by-Side Comparison
| Feature | infection | injection |
|---|---|---|
| Definition | The act or process of infecting. | The act of injecting, or something that is injected. |
Where the eye mixes infection and injection
Muted = shared; highlighted = the visual trap. They share 8 letters in sequence. infection and injection follow the identical consonant-vowel pattern (VCCVCCVVC). Same shape at a glance is often the real trap, independent of shared letters.
Look-alike desk: infection vs injection
A purely visual mix-up. infection (/ɪnˈfɛkʃən/) and injection (/ɪnˈd͡ʒɛk.ʃən/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by a single letter - f in “infection” becomes j in “injection”. Our composite confusion score for this pair is 11331, derived from the frequency rank of both members and their visual similarity.
infection is recorded at frequency rank #4,093, classified as anoun, pronounced /ɪnˈfɛkʃən/. injection is at rank #7,238, tagged as anoun, pronounced /ɪnˈd͡ʒɛk.ʃən/.
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 11331, this pair ranks #487,641 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of infection vs injection
Shared letters: ceinot. Private to "infection": f. Private to "injection": j.
"infection" · 9 letters · shape VCCVCCVVC · "injection" · 9 letters · shape VCCVCCVVC
Known mistypes of this pair
Frequently Asked Questions
Do "infection" and "injection" mean the same thing in a sentence?
In ordinary English text, does "infection" or "injection" show up more?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "infection" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "injection" - compare definitions side by side with the headword page. Word entry
- This pair ranks #487,641 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "infection" and "injection" also get mixed up with nearby pairs, the highest-scored neighbour is "injection vs injector". 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 #487,641 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.