lasvsluzWhat's the difference?

Quick tell: las is a article, luz is a noun, so they fill different roles in a sentence.

Which to use

“las” is an article and “luz” is a noun - they look or sound alike but fill different roles in a sentence.

#15
“las” frequency rank
#469
“luz” frequency rank
484
confusion score

Side-by-Side Comparison

Feature las luz
Definition Artículo determinado femenino plural. Antecede a sustantivos femeninos en plural denotando que estos deben tomarse como información general consabida. Radiación electromagnética visible al ojo humano.

Where the eye mixes las and luz

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

3 ch
las
3 ch
luz

Look-alike desk: las vs luz

These two trip readers on the page rather than in the ear: las is [las] while luz is [ˈlus]. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (article vs noun), which is usually the fastest check. Our composite confusion score for this pair is 484, derived from the frequency rank of both members and their visual similarity.

las is recorded at frequency rank #15, classified as anarticle, pronounced [las]. luz is at rank #469, tagged as anoun, pronounced [ˈlus].

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 484, this pair ranks #323,359 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of las vs luz

Shared letters: l. Private to "las": as. Private to "luz": uz.

"las" · 3 letters · shape CVC  ·  "luz" · 3 letters · shape CVC

Frequently Asked Questions

Can "las" and "luz" be used interchangeably?
No - they are not even the same part of speech. "las" is an article and "luz" a noun, so a sentence built for one is usually ungrammatical with the other.
In ordinary Spanish text, does "las" or "luz" show up more?
"las" is the more common of the two: it sits at frequency rank #15 in our Spanish list, against #469 for "luz". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

What to do next

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

  • Full dictionary entry for "las" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "luz" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #323,359 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "las" and "luz" also get mixed up with nearby pairs, the highest-scored neighbour is "lac vs luz". Nearby pair

Confusion rank #323,359 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