Which to use
“old” is an adjective and “ONU” is an abbrev - they look or sound alike but fill different roles in a sentence.
- #11,277
- “old” frequency rank
- #4,027
- “ONU” frequency rank
- 15304
- confusion score
Side-by-Side Comparison
| Feature | old | ONU |
|---|---|---|
| Definition | Viejo, anciano. | Organización de las Naciones Unidas (la mayor organización internacional existente). |
Where the eye mixes old and ONU
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Look-alike desk: old vs ONU
These two trip readers on the page rather than in the ear: old is /ˈəʊld/ while ONU is [ˈonu]. 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 (adjective vs abbrev), which is usually the fastest check. Our composite confusion score for this pair is 15304, derived from the frequency rank of both members and their visual similarity.
old is recorded at frequency rank #11,277, classified as anadj, pronounced /ˈəʊld/. ONU is at rank #4,027, tagged as anabbrev, pronounced [ˈonu].
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 15304, this pair ranks #280,702 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of old vs ONU
Shared letters: o. Private to "old": dl. Private to "ONU": nu.
"old" · 3 letters · shape VCC · "ONU" · 3 letters · shape VCV
Frequently Asked Questions
Can "old" and "ONU" be used interchangeably?
In ordinary Spanish text, does "old" or "ONU" 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 "old" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "ONU" - compare definitions side by side with the headword page. Word entry
- This pair ranks #280,702 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "old" and "ONU" also get mixed up with nearby pairs, the highest-scored neighbour is "old vs ome". Nearby pair
Confusion rank #280,702 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.