ilusovsIusConfusable pair

Quick tell: iluso is a adjective, Ius is a name, so they fill different roles in a sentence.

Which to use

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

#32,701
“iluso” frequency rank
#43,081
“Ius” frequency rank
75782
confusion score

Side-by-Side Comparison

Feature iluso Ius
Definition Que es fácil de engañar por confiar demasiado en la bondad de los demás. Apellido.

Where the eye mixes iluso and Ius

Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.

5 ch
iluso
3 ch
Ius

Why the eye confuses iluso with Ius

These two trip readers on the page rather than in the ear: iluso is [iˈluso] while Ius is [ˈjus]. 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 (adjective vs name), which is usually the fastest check. Our composite confusion score for this pair is 75782, derived from the frequency rank of both members and their visual similarity.

iluso is recorded at frequency rank #32,701, classified as anadj, pronounced [iˈluso]. Ius is at rank #43,081, tagged as aname, pronounced [ˈjus].

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 75782, this pair ranks #18,917 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.

Orthographic DNA of iluso vs Ius

Shared letters: isu. Private to "iluso": lo. Private to "Ius": -.

"iluso" · 5 letters · shape VCVCV  ·  "Ius" · 3 letters · shape VVC

Known mistypes of this pair

  • ilusoilluso · ilsuo · iluos · ilusso · iulso · liuso

Frequently Asked Questions

Do "iluso" and "Ius" mean the same thing in a sentence?
No - they are not even the same part of speech. "iluso" is an adjective and "Ius" a name, so a sentence built for one is usually ungrammatical with the other.
In ordinary Spanish text, does "iluso" or "Ius" show up more?
"iluso" is the more common of the two: it sits at frequency rank #32,701 in our Spanish list, against #43,081 for "Ius". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

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 "iluso" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "Ius" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #18,917 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "iluso" and "Ius" also get mixed up with nearby pairs, the highest-scored neighbour is "Ius vs iza". 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 #18,917 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