subevssumWhich spelling fits?

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

Which to use

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

#2,528
“sube” frequency rank
#27,789
“sum” frequency rank
30317
confusion score

Side-by-Side Comparison

Feature sube sum
Definition Tercera persona del singular (él, ella, ello; usted, 2.ª persona) del presente de indicativo de subir o de subirse. Suma, adición.

Where the eye mixes sube and sum

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

4 ch
sube
3 ch
sum

Why the eye confuses sube with sum

These two trip readers on the page rather than in the ear: sube is [ˈsuβ̞e] while sum is [sʌm]. 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 30317, derived from the frequency rank of both members and their visual similarity.

sube is recorded at frequency rank #2,528, classified as averb, pronounced [ˈsuβ̞e]. sum is at rank #27,789, tagged as anoun, pronounced [sʌm].

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 30317, this pair ranks #212,573 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of sube vs sum

Shared letters: su. Private to "sube": be. Private to "sum": m.

"sube" · 4 letters · shape CVCV  ·  "sum" · 3 letters · shape CVC

Known mistypes of this pair

  • subesbue · ssube · subbe · sueb · suve · usbe

Frequently Asked Questions

Is swapping "sube" for "sum" ever safe?
No - they are not even the same part of speech. "sube" is a verb and "sum" a noun, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "sube" or "sum"?
"sube" is the more common of the two: it sits at frequency rank #2,528 in our Spanish list, against #27,789 for "sum". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

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 "sube" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "sum" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #212,573 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "sube" and "sum" also get mixed up with nearby pairs, the highest-scored neighbour is "stem vs sum". 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 #212,573 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list