alterarvsalturaWhat's the difference?

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

Which to use

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

#5,593
“alterar” frequency rank
#905
“altura” frequency rank
6498
confusion score

Side-by-Side Comparison

Feature alterar altura
Definition tornar diferente em algum aspecto como tamanho, peso, estilo, etc comprimento de um objeto medido da base até o topo

Where the eye mixes alterar and altura

Muted = shared; highlighted = the visual trap. They share 5 letters in sequence. alterar runs 7 letters (VCCVCVC) against altura's 6 (VCCVCV) - the length gap alone is often enough to separate them once you know to check it.

7 ch
alterar
6 ch
altura

Visual trap between alterar and altura

These two trip readers on the page rather than in the ear: alterar is /aɫ.tɨ.ˈɾaɾ/ while altura is /aɫ.ˈtu.ɾɐ/. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (verb vs noun), which is usually the fastest check. Our composite confusion score for this pair is 6498, derived from the frequency rank of both members and their visual similarity.

alterar is recorded at frequency rank #5,593, classified as averb, pronounced /aɫ.tɨ.ˈɾaɾ/. altura is at rank #905, tagged as anoun, pronounced /aɫ.ˈtu.ɾɐ/.

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 6498, this pair ranks #67,927 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of alterar vs altura

Shared letters: alrt. Private to "alterar": e. Private to "altura": u.

"alterar" · 7 letters · shape VCCVCVC  ·  "altura" · 6 letters · shape VCCVCV

Known mistypes of this pair

  • alterar ← aletrar · allterar · altearr · alterarr · alterra · alterrar · altrear · altterar
  • altura ← alltura · altrua · alttura · altuar · alturra · alutra · atlura · latura

Frequently Asked Questions

Do "alterar" and "altura" mean the same thing in a sentence?
No - they are not even the same part of speech. "alterar" is a verb and "altura" a noun, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "alterar" or "altura"?
"altura" is the more common of the two: it sits at frequency rank #905 in our Portuguese list, against #5,593 for "alterar". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "alterar" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "altura" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #67,927 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "alterar" and "altura" also get mixed up with nearby pairs, the highest-scored neighbour is "alienar vs alterar". 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 #67,927 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