ilo vs iso, What's the Difference?

Which to use

“ilo” and “iso” are a confusable Spanish pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#43,641
“ilo” frequency rank: #12,180
“iso” frequency rank: 55821
confusion score

Side-by-Side Comparison

Feature	ilo	iso
Definition	Herramienta	Cielo

Where the eye mixes ilo and iso

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

3 ch

ilo

3 ch

iso

Visual trap between ilo and iso

A purely visual mix-up. ilo (/ˈilo/) and iso (/ìsó/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by a single letter - l in “ilo” becomes s in “iso”. Our composite confusion score for this pair is 55821, derived from the frequency rank of both members and their visual similarity.

ilo is recorded at frequency rank #43,641, classified as anoun, pronounced /ˈilo/. iso is at rank #12,180, tagged as anoun, pronounced /ìsó/.

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 55821, this pair ranks #77,196 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.

Orthographic DNA of ilo vs iso

Shared letters: io. Private to "ilo": l. Private to "iso": s.

"ilo" · 3 letters · shape VCV · "iso" · 3 letters · shape VCV

Frequently Asked Questions

Is swapping "ilo" for "iso" ever safe?

No. They are said differently (/ˈilo/ versus /ìsó/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.

Which is more common, "ilo" or "iso"?

"iso" is the more common of the two: it sits at frequency rank #12,180 in our Spanish list, against #43,641 for "ilo". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Eye-level mix-up between "ilo" and "iso" is sorted above. Next: full entries or other pairs that share a letter shape.

Full dictionary entry for "ilo" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "iso" - compare definitions side by side with the headword page. Word entry
This pair ranks #77,196 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
"ilo" and "iso" also get mixed up with nearby pairs, the highest-scored neighbour is "ilo vs iza". Nearby pair

Confusion rank #77,196 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.