infernovsinternoWhat's the difference?

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

Which to use

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

#2,015
“inferno” frequency rank
#3,269
“interno” frequency rank
5284
confusion score

Side-by-Side Comparison

Feature inferno interno
Definition qualquer região inferior ou subterrânea; ínfero interior; de dentro

Where the eye mixes inferno and interno

Muted = shared; highlighted = the visual trap. They share 6 letters in sequence. inferno and interno follow the identical consonant-vowel pattern (VCCVCCV). Same shape at a glance is often the real trap, independent of shared letters.

7 ch
inferno
7 ch
interno

Visual trap between inferno and interno

These two trip readers on the page rather than in the ear: inferno is /ĩ.ˈfɛɾ.nu/ while interno is /ĩ.ˈtɛɾ.nu/. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - f in “inferno” becomes t in “interno”, and the parts of speech differ too (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 5284, derived from the frequency rank of both members and their visual similarity.

inferno is recorded at frequency rank #2,015, classified as anoun, pronounced /ĩ.ˈfɛɾ.nu/. interno is at rank #3,269, tagged as anadj, pronounced /ĩ.ˈtɛɾ.nu/.

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 5284, this pair ranks #69,364 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of inferno vs interno

Shared letters: einor. Private to "inferno": f. Private to "interno": t.

"inferno" · 7 letters · shape VCCVCCV  ·  "interno" · 7 letters · shape VCCVCCV

Known mistypes of this pair

  • inferno ← ifnerno · inefrno · infenro · infernno · inferon · inferrno · infferno · infreno
  • interno ← inetrno · innterno · intenro · internno · interon · interrno · intreno · intterno

Frequently Asked Questions

Can "inferno" and "interno" be used interchangeably?
No - they are not even the same part of speech. "inferno" is a noun and "interno" an adjective, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "inferno" or "interno"?
"inferno" is the more common of the two: it sits at frequency rank #2,015 in our Portuguese list, against #3,269 for "interno". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

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

  • Full dictionary entry for "inferno" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "interno" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #69,364 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "inferno" and "interno" also get mixed up with nearby pairs, the highest-scored neighbour is "internal vs interno". 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 #69,364 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