off vs os, What's the Difference?

Which to use

“off” is an adverb and “os” is a pronoun - they look or sound alike but fill different roles in a sentence.

#6,804
“off” frequency rank: #449
“os” frequency rank: 7253
confusion score

Side-by-Side Comparison

Feature	off	os
Definition	Fuera, afuera.	Caso acusativo y dativo del pronombre personal vosotros, una de las formas de la segunda persona del plural en español.

Where the spellings diverge

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

3 ch

off

2 ch

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: off is /ɒf/ while os is [os]. 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 (adverb vs pronoun), which is usually the fastest check. Our composite confusion score for this pair is 7253, derived from the frequency rank of both members and their visual similarity.

off is recorded at frequency rank #6,804, classified as anadv, pronounced /ɒf/. os is at rank #449, tagged as apron, pronounced [os].

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 7253, this pair ranks #308,513 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of off vs os

Shared letters: o. Private to "off": f. Private to "os": s.

"off" · 3 letters · shape VCC · "os" · 2 letters · shape VC

Frequency comparison

off#6,804

os#449

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "off" and "os" be used interchangeably?

No - they are not even the same part of speech. "off" is an adverb and "os" a pronoun, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "off" or "os"?

"os" is the more common of the two: it sits at frequency rank #449 in our Spanish list, against #6,804 for "off". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Remembering off vs os

The fastest way to pick the right one every time.

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