semivssumWhich spelling fits?

Which to use

“semi” and “sum” are a confusable Spanish pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#8,052
“semi” frequency rank
#27,789
“sum” frequency rank
35841
confusion score

Side-by-Side Comparison

Feature semi sum
Definition Forma del plural de seme Suma, adición.

Where the eye mixes semi and sum

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

4 ch
semi
3 ch
sum

Visual trap between semi and sum

A purely visual mix-up. semi (/ˈsɛ.mi/) and sum ([sʌm]) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 35841, derived from the frequency rank of both members and their visual similarity.

semi is recorded at frequency rank #8,052, classified as anoun, pronounced /ˈsɛ.mi/. 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 35841, this pair ranks #183,898 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of semi vs sum

Shared letters: ms. Private to "semi": ei. Private to "sum": u.

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

Known mistypes of this pair

  • semicemi · esmi · seim · semmi · smei · ssemi

Frequently Asked Questions

Do "semi" and "sum" mean the same thing in a sentence?
No. They are said differently (/ˈsɛ.mi/ versus [sʌm]) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Frequency check: "semi" vs "sum" - which ranks higher?
"semi" is the more common of the two: it sits at frequency rank #8,052 in our Spanish list, against #27,789 for "sum". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

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

  • Full dictionary entry for "semi" 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 #183,898 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "semi" 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 #183,898 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