sapvssuWhat's the difference?

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

Which to use

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

#32,768
“sap” frequency rank
#6,713
“su” frequency rank
39481
confusion score

Side-by-Side Comparison

Feature sap su
Definition seiva dele

Letter map: sap vs su

Shared letters muted; letters that set sap and su apart highlighted. Shared run: 1.

3 ch
sap
2 ch
su

Role in the sentence - sap and su

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: sap is anoun and suanadjective. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 39481, derived from the frequency rank of both members and their visual similarity.

sap is recorded at frequency rank #32,768, classified as anoun, pronounced /sæp/. su is at rank #6,713, tagged as anadj.

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 39481, this pair ranks #26,753 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of sap vs su

Shared letters: s. Private to "sap": ap. Private to "su": u.

"sap" · 3 letters · shape CVC  ·  "su" · 2 letters · shape CV

Frequently Asked Questions

Can "sap" and "su" be used interchangeably?
No - they are not even the same part of speech. "sap" is a noun and "su" an adjective, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "sap" or "su"?
"su" is the more common of the two: it sits at frequency rank #6,713 in our Portuguese list, against #32,768 for "sap". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Done with this confusable. These links stay specific to "sap" and "su".

  • Full dictionary entry for "sap" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "su" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #26,753 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "sap" and "su" also get mixed up with nearby pairs, the highest-scored neighbour is "sap vs soap". Nearby pair

Confusion rank #26,753 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