factvsflatWhat's the difference?

Quick tell: fact is a noun, flat is an adjective, so they fill different roles in a sentence.

Which to use

“fact” is a noun and “flat” is an adjective - they look or sound alike but fill different roles in a sentence.

#30,550
“fact” frequency rank
#21,752
“flat” frequency rank
52302
confusion score

Side-by-Side Comparison

Feature fact flat
Definition facto ^((português europeu)) ou fato ^((português do Brasil)) chato, liso, plano

Where the eye mixes fact and flat

Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.

4 ch
fact
4 ch
flat

Look-alike desk: fact vs flat

These two trip readers on the page rather than in the ear: fact is /ˈfækt/ while flat is /flæt/. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 52302, derived from the frequency rank of both members and their visual similarity.

fact is recorded at frequency rank #30,550, classified as anoun, pronounced /ˈfækt/. flat is at rank #21,752, tagged as anadj, pronounced /flæt/.

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 52302, this pair ranks #12,871 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of fact vs flat

Shared letters: aft. Private to "fact": c. Private to "flat": l.

"fact" · 4 letters · shape CVCC  ·  "flat" · 4 letters · shape CCVC

Known mistypes of this pair

  • factafct · facct · factt · fatc · fcat · ffact
  • flatfalt · fflat · flatt · fllat · flta · lfat

Frequently Asked Questions

Do "fact" and "flat" mean the same thing in a sentence?
No - they are not even the same part of speech. "fact" is a noun and "flat" an adjective, so a sentence built for one is usually ungrammatical with the other.
In ordinary Portuguese text, does "fact" or "flat" show up more?
"flat" is the more common of the two: it sits at frequency rank #21,752 in our Portuguese list, against #30,550 for "fact". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

  • Full dictionary entry for "fact" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "flat" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #12,871 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "fact" and "flat" also get mixed up with nearby pairs, the highest-scored neighbour is "fact vs fava". 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 #12,871 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