UdivsútilWhich spelling fits?

Quick tell: Udi is a name, útil is an adjective, so they fill different roles in a sentence.

Which to use

“Udi” is a name and “útil” is an adjective - they look or sound alike but fill different roles in a sentence.

#21,526
“Udi” frequency rank
#2,279
“útil” frequency rank
23805
confusion score

Side-by-Side Comparison

Feature Udi útil
Definition Apellido. Que sirve a un efecto.

Where the eye mixes Udi and útil

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

3 ch
Udi
4 ch
útil

Visual trap between Udi and útil

These two trip readers on the page rather than in the ear: Udi is [ˈuð̞i] while útil is [ˈut̪il]. 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 (name vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 23805, derived from the frequency rank of both members and their visual similarity.

Udi is recorded at frequency rank #21,526, classified as aname, pronounced [ˈuð̞i]. útil is at rank #2,279, tagged as anadj, pronounced [ˈut̪il].

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 23805, this pair ranks #244,075 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of Udi vs útil

Shared letters: i. Private to "Udi": du. Private to "útil": ltú.

"Udi" · 3 letters · shape VCV  ·  "útil" · 4 letters · shape VCVC

Frequently Asked Questions

Can "Udi" and "útil" be used interchangeably?
No - they are not even the same part of speech. "Udi" is a name and "útil" an adjective, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "Udi" or "útil"?
"útil" is the more common of the two: it sits at frequency rank #2,279 in our Spanish list, against #21,526 for "Udi". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "Udi" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "útil" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #244,075 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "Udi" and "útil" also get mixed up with nearby pairs, the highest-scored neighbour is "Udi vs UPN". Nearby pair

Confusion rank #244,075 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list