USFvsUSPSTell them apart

Which to use

“USF” and “USPS” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#38,224
“USF” frequency rank
#23,149
“USPS” frequency rank
61373
confusion score

Side-by-Side Comparison

Feature USF USPS
Definition Initialism of Nintendo Ultra 64 Sound Format. Initialism of United States Postal Service.

Letter map: USF vs USPS

Shared letters muted; letters that set USF and USPS apart highlighted. Shared run: 2.

3 ch
USF
4 ch
USPS

Corpus notes: USF and USPS

USF and USPS are indexed as a confusable English pair. We have no recorded pronunciation or part of speech for both members, so the spelling overlap is what we can show you: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 61373, derived from the frequency rank of both members and their visual similarity.

USF is recorded at frequency rank #38,224, classified as aname. USPS is at rank #23,149, tagged as aname, pronounced /ˌju ɛs pi ˈɛs/.

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 61373, this pair ranks #94,708 of 530,003 scored English confusable pairs - among the most confusable pairs.

Orthographic DNA of USF vs USPS

Shared letters: su. Private to "USF": f. Private to "USPS": p.

"USF" · 3 letters · shape VCC  ·  "USPS" · 4 letters · shape VCCC

Known mistypes of this pair

  • USPSsups · upss · uspps · uspss · ussp · ussps

Frequently Asked Questions

Is swapping "USF" for "USPS" ever safe?
No. They differ by 1 letter(s) in length, but the dictionary glosses above give them different meanings, so swapping one for the other changes what the sentence says.
Frequency check: "USF" vs "USPS" - which ranks higher?
"USPS" is the more common of the two: it sits at frequency rank #23,149 in our English list, against #38,224 for "USF". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Done with this confusable. These links stay specific to "USF" and "USPS".

  • Full dictionary entry for "USF" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "USPS" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #94,708 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "USF" and "USPS" also get mixed up with nearby pairs, the highest-scored neighbour is "UAS vs USF". 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 #94,708 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