Which to use
“filón” is a noun and “fio” is a verb - they look or sound alike but fill different roles in a sentence.
- #42,452
- “filón” frequency rank
- #33,129
- “fio” frequency rank
- 75581
- confusion score
Side-by-Side Comparison
| Feature | filón | fio |
|---|---|---|
| Definition | Masa metálifera o pétrea que llena una grieta de las rocas, frecuentemente depositada por sedimentación de aguas subterráneas o de origen volcánico. | Tercera persona del singular (él, ella, ello; usted, 2.ª persona) del pretérito perfecto simple de indicativo de fiar. |
Where the eye mixes filón and fio
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. filón runs 5 letters (CVCVC) against fio's 3 (CVV) - the length gap alone is often enough to separate them once you know to check it.
Look-alike desk: filón vs fio
These two trip readers on the page rather than in the ear: filón is [fiˈlõn] while fio is [ˈfjo]. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 letter(s) in length, and the parts of speech differ too (noun vs verb), which is usually the fastest check. Our composite confusion score for this pair is 75581, derived from the frequency rank of both members and their visual similarity.
filón is recorded at frequency rank #42,452, classified as anoun, pronounced [fiˈlõn]. fio is at rank #33,129, tagged as averb, pronounced [ˈfjo].
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 75581, this pair ranks #19,261 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.
Orthographic DNA of filón vs fio
Shared letters: fi. Private to "filón": lnó. Private to "fio": o.
"filón" · 5 letters · shape CVCVC · "fio" · 3 letters · shape CVV
Frequently Asked Questions
Do "filón" and "fio" mean the same thing in a sentence?
In ordinary Spanish text, does "filón" or "fio" show up more?
Useful next steps
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "filón" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "fio" - compare definitions side by side with the headword page. Word entry
- This pair ranks #19,261 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "filón" and "fio" also get mixed up with nearby pairs, the highest-scored neighbour is "filón vs filos". Nearby pair
Confusion rank #19,261 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.