fossevsfossoConfusable pair

Quick tell: fosse is a verb, fosso is a noun, so they fill different roles in a sentence.

Which to use

“fosse” is a verb and “fosso” is a noun - they look or sound alike but fill different roles in a sentence.

#348
“fosse” frequency rank
#15,815
“fosso” frequency rank
16163
confusion score

Side-by-Side Comparison

Feature fosse fosso
Definition primeira pessoa do singular do pretérito imperfeito do conjuntivo do verbo ser cova

Where the eye mixes fosse and fosso

Muted = shared; highlighted = the visual trap. They share 4 letters in sequence.

5 ch
fosse
5 ch
fosso

Visual trap between fosse and fosso

These two trip readers on the page rather than in the ear: fosse is /ˈfo.si/ while fosso is /ˈfo.su/. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - e in “fosse” becomes o in “fosso”, and the parts of speech differ too (verb vs noun), which is usually the fastest check. Our composite confusion score for this pair is 16163, derived from the frequency rank of both members and their visual similarity.

fosse is recorded at frequency rank #348, classified as averb, pronounced /ˈfo.si/. fosso is at rank #15,815, tagged as anoun, pronounced /ˈfo.su/.

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 16163, this pair ranks #55,444 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of fosse vs fosso

Shared letters: fos. Private to "fosse": e. Private to "fosso": -.

"fosse" · 5 letters · shape CVCCV  ·  "fosso" · 5 letters · shape CVCCV

Known mistypes of this pair

  • fosseffosse · fose · foses · fsose · ofsse
  • fossoffosso · foso · fosos · fsoso · ofsso

Frequently Asked Questions

Is swapping "fosse" for "fosso" ever safe?
No - they are not even the same part of speech. "fosse" is a verb and "fosso" a noun, so a sentence built for one is usually ungrammatical with the other.
In ordinary Portuguese text, does "fosse" or "fosso" show up more?
"fosse" is the more common of the two: it sits at frequency rank #348 in our Portuguese list, against #15,815 for "fosso". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Useful next steps

Eye-level mix-up between "fosse" and "fosso" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "fosse" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "fosso" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #55,444 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "fosse" and "fosso" also get mixed up with nearby pairs, the highest-scored neighbour is "fosco vs fosso". 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 #55,444 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list