on vs ort, What's the Difference?

Which to use

“on” is a num and “ort” is a preposition - they look or sound alike but fill different roles in a sentence.

#1,908
“on” frequency rank: #43,156
“ort” frequency rank: 45064
confusion score

Side-by-Side Comparison

Feature	on	ort
Definition	Diez.	Forma combinada de la preposición ar y el pronombre personal de segunda persona singular.

Where the spellings diverge

Shared letters are muted; the letters that actually set on and ort apart are highlighted. They share 1 letter in sequence, which is exactly why the eye skips the difference.

2 ch

3 ch

ort

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: on is [ˈon] while ort is [ɔɾˠt̪ˠ]. 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 (num vs preposition), which is usually the fastest check. Our composite confusion score for this pair is 45064, derived from the frequency rank of both members and their visual similarity.

on is recorded at frequency rank #1,908, classified as anum, pronounced [ˈon]. ort is at rank #43,156, tagged as aprep, pronounced [ɔɾˠt̪ˠ].

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 45064, this pair ranks #133,603 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of on vs ort

Shared letters: o. Private to "on": n. Private to "ort": rt.

"on" · 2 letters · shape VC · "ort" · 3 letters · shape VCC

Frequency comparison

on#1,908

ort#43,156

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "on" and "ort" be used interchangeably?

No - they are not even the same part of speech. "on" is a num and "ort" a preposition, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "on" or "ort"?

"on" is the more common of the two: it sits at frequency rank #1,908 in our Spanish list, against #43,156 for "ort". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Remembering on vs ort

The fastest way to pick the right one every time.

Check the role first: if you need a num, it's “on”; for a preposition, it's “ort”.
See each word in full, definition, IPA, etymology and its other confusables. Full “on” entry
Browse more pairs most likely to be confused. Most confusable