oppvsorgWhich spelling fits?

Quick tell: opp is a preposition, org is a noun, so they fill different roles in a sentence.

Which to use

“opp” is a preposition and “org” is a noun - they look or sound alike but fill different roles in a sentence.

#35,442
“opp” frequency rank
#13,973
“org” frequency rank
49415
confusion score

Side-by-Side Comparison

Feature opp org
Definition Abbreviation of opposite. Clipping of organization.

Letter map: opp vs org

Shared letters muted; letters that set opp and org apart highlighted. Shared run: 1.

3 ch
opp
3 ch
org

Part-of-speech tell for opp / org

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: opp is apreposition and organoun. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 49415, derived from the frequency rank of both members and their visual similarity.

opp is recorded at frequency rank #35,442, classified as aprep, pronounced /ɒp/. org is at rank #13,973, tagged as anoun.

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 49415, this pair ranks #183,856 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of opp vs org

Shared letters: o. Private to "opp": p. Private to "org": gr.

"opp" · 3 letters · shape VCC  ·  "org" · 3 letters · shape VCC

Frequently Asked Questions

Is swapping "opp" for "org" ever safe?
No - they are not even the same part of speech. "opp" is a preposition and "org" a noun, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "opp" or "org"?
"org" is the more common of the two: it sits at frequency rank #13,973 in our English list, against #35,442 for "opp". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

You've compared "opp" and "org". Here's where to go from here.

  • Full dictionary entry for "opp" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "org" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #183,856 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "opp" and "org" also get mixed up with nearby pairs, the highest-scored neighbour is "omi vs opp". Nearby pair

Confusion rank #183,856 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list