sud vs Sulu, What's the Difference?

Which to use

“sud” is a noun and “Sulu” is a name - they look or sound alike but fill different roles in a sentence.

#37,717
“sud” frequency rank: #37,718
“Sulu” frequency rank: 75435
confusion score

Side-by-Side Comparison

Feature	sud	Sulu
Definition	A bubble of lather or foam (the singular of suds).	A province of Mindanao, Philippines. Capital: Jolo & Patikul.

Where the spellings diverge

Shared letters are muted; the letters that actually set sud and Sulu apart are highlighted. They share 2 letters in sequence, which is exactly why the eye skips the difference.

3 ch

sud

4 ch

Sulu

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: sud is /sʌd/ while Sulu is /sʊˈlu/. 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 (noun vs name), which is usually the fastest check. Our composite confusion score for this pair is 75435, derived from the frequency rank of both members and their visual similarity.

sud is recorded at frequency rank #37,717, classified as anoun, pronounced /sʌd/. Sulu is at rank #37,718, tagged as aname, pronounced /sʊˈlu/.

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 75435, this pair ranks #33,142 of 530,003 scored English confusable pairs - among the most confusable pairs.

Orthographic DNA of sud vs Sulu

Shared letters: su. Private to "sud": d. Private to "Sulu": l.

"sud" · 3 letters · shape CVC · "Sulu" · 4 letters · shape CVCV

Known mistypes of this pair

Sulu ← sluu · ssulu · sullu · suul · uslu

Frequency comparison

sud#37,717

Sulu#37,718

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "sud" and "Sulu" be used interchangeably?

No - they are not even the same part of speech. "sud" is a noun and "Sulu" a name, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "sud" or "Sulu"?

"sud" is the more common of the two: it sits at frequency rank #37,717 in our English list, against #37,718 for "Sulu". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Remembering sud vs Sulu

The fastest way to pick the right one every time.

Check the role first: if you need a noun, it's “sud”; for a name, it's “Sulu”.
See each word in full, definition, IPA, etymology and its other confusables. Full “sud” entry
Browse more pairs most likely to be confused. Most confusable