Which to use
“infección” is a noun and “infecciosa” is an adjective - they look or sound alike but fill different roles in a sentence.
- #6,547
- “infección” frequency rank
- #39,813
- “infecciosa” frequency rank
- 46360
- confusion score
Side-by-Side Comparison
| Feature | infección | infecciosa |
|---|---|---|
| Definition | Acción o efecto de infectar o de infectarse. | Forma del femenino de infeccioso. |
Where the eye mixes infección and infecciosa
Muted = shared; highlighted = the visual trap. They share 7 letters in sequence. infección runs 9 letters (VCCVCCVVC) against infecciosa's 10 (VCCVCCVVCV) - the length gap alone is often enough to separate them once you know to check it.
Visual trap between infección and infecciosa
These two trip readers on the page rather than in the ear: infección is [ĩɱfekˈsjõn] while infecciosa is [ĩɱfekˈsjosa]. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 46360, derived from the frequency rank of both members and their visual similarity.
infección is recorded at frequency rank #6,547, classified as anoun, pronounced [ĩɱfekˈsjõn]. infecciosa is at rank #39,813, tagged as anadj, pronounced [ĩɱfekˈsjosa].
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 46360, this pair ranks #126,179 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of infección vs infecciosa
Shared letters: cefin. Private to "infección": ó. Private to "infecciosa": aos.
"infección" · 9 letters · shape VCCVCCVVC · "infecciosa" · 10 letters · shape VCCVCCVVCV
Known mistypes of this pair
- infecciosa ← ifnecciosa · inefcciosa · infceciosa · infeccioas · infeccisoa · infeccoisa · infecicosa · infeciosa
Frequently Asked Questions
Do "infección" and "infecciosa" mean the same thing in a sentence?
In ordinary Spanish text, does "infección" or "infecciosa" show up more?
Useful next steps
Eye-level mix-up between "infección" and "infecciosa" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "infección" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "infecciosa" - compare definitions side by side with the headword page. Word entry
- This pair ranks #126,179 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "infección" and "infecciosa" also get mixed up with nearby pairs, the highest-scored neighbour is "infecciosa vs infecciosas". 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 #126,179 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.