Which to use
“FOSS” and “fox” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #33,655
- “FOSS” frequency rank
- #2,204
- “fox” frequency rank
- 35859
- confusion score
Side-by-Side Comparison
| Feature | FOSS | fox |
|---|---|---|
| Definition | Initialism of Free and Open Source Software. | A small-to-medium-sized canine mammal, related to dogs and wolves, with a flattened skull, upright triangular ears, a pointed, slightly upturned snout, and a long bushy tail, of the following groups: |
Where the eye mixes FOSS and fox
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Look-alike desk: FOSS vs fox
A purely visual mix-up. FOSS (/fɒs/) and fox (/fɒks/) 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 1 letter(s) in length. Our composite confusion score for this pair is 35859, derived from the frequency rank of both members and their visual similarity.
FOSS is recorded at frequency rank #33,655, classified as anoun, pronounced /fɒs/. fox is at rank #2,204, tagged as anoun, pronounced /fɒks/.
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 35859, this pair ranks #308,303 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of FOSS vs fox
Shared letters: fo. Private to "FOSS": s. Private to "fox": x.
"FOSS" · 4 letters · shape CVCC · "fox" · 3 letters · shape CVC
Known mistypes of this pair
- FOSS ← ffoss · fos · fsos · ofss
Frequently Asked Questions
Is swapping "FOSS" for "fox" ever safe?
In ordinary English text, does "FOSS" or "fox" show up more?
After this comparison
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "FOSS" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "fox" - compare definitions side by side with the headword page. Word entry
- This pair ranks #308,303 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "FOSS" and "fox" also get mixed up with nearby pairs, the highest-scored neighbour is "FOMO vs FOSS". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #308,303 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.