altervsAutorWhat's the difference?

Quick tell: alter is a pronoun, Autor is a noun, so they fill different roles in a sentence.

Which to use

“alter” is a pronoun and “Autor” is a noun - they look or sound alike but fill different roles in a sentence.

#23,189
“alter” frequency rank
#845
“Autor” frequency rank
24034
confusion score

Side-by-Side Comparison

Feature alter Autor
Definition outro (dentre dois) autor

Letter map: alter vs Autor

Shared letters muted; letters that set alter and Autor apart highlighted. Shared run: 3.

5 ch
alter
5 ch
Autor

Grammar separator: alter vs Autor

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: alter is apronoun and Autoranoun. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 24034, derived from the frequency rank of both members and their visual similarity.

alter is recorded at frequency rank #23,189, classified as apron. Autor is at rank #845, tagged as anoun, pronounced /ˈaʊ̯toːɐ̯/.

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 24034, this pair ranks #45,674 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of alter vs Autor

Shared letters: art. Private to "alter": el. Private to "Autor": ou.

"alter" · 5 letters · shape VCCVC  ·  "Autor" · 5 letters · shape VVCVC

Known mistypes of this pair

  • alteraletr · allter · alterr · altre · altter · atler
  • Autoratuor · auotr · autorr · autro · auttor · uator

Frequently Asked Questions

Can "alter" and "Autor" be used interchangeably?
No - they are not even the same part of speech. "alter" is a pronoun and "Autor" a noun, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "alter" vs "Autor" - which ranks higher?
"Autor" is the more common of the two: it sits at frequency rank #845 in our Portuguese list, against #23,189 for "alter". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

What to do next

Pair "alter" vs "Autor" is on the table, pick a follow-up below.

  • Full dictionary entry for "alter" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "Autor" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #45,674 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "alter" and "Autor" also get mixed up with nearby pairs, the highest-scored neighbour is "alles vs alter". 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 #45,674 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