sus vs sy, What's the Difference?

Which to use

“sus” is an intj and “sy” is a noun - they look or sound alike but fill different roles in a sentence.

#32
“sus” frequency rank: #33,866
“sy” frequency rank: 33898
confusion score

Side-by-Side Comparison

Feature	sus	sy
Definition	Se emplea para avivar, infundir ánimo e incitar a la acción rápida y con vigor.	Madre.

Where the eye mixes sus and sy

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

3 ch

sus

2 ch

Visual trap between sus and sy

These two trip readers on the page rather than in the ear: sus is [sus] while sy is [ˈsɨ]. 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 (intj vs noun), which is usually the fastest check. Our composite confusion score for this pair is 33898, derived from the frequency rank of both members and their visual similarity.

sus is recorded at frequency rank #32, classified as anintj, pronounced [sus]. sy is at rank #33,866, tagged as anoun, pronounced [ˈsɨ].

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 33898, this pair ranks #194,293 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of sus vs sy

Shared letters: s. Private to "sus": u. Private to "sy": y.

"sus" · 3 letters · shape CVC · "sy" · 2 letters · shape CV

Frequently Asked Questions

Is swapping "sus" for "sy" ever safe?

No - they are not even the same part of speech. "sus" is an intj and "sy" a noun, so a sentence built for one is usually ungrammatical with the other.

In ordinary Spanish text, does "sus" or "sy" show up more?

"sus" is the more common of the two: it sits at frequency rank #32 in our Spanish list, against #33,866 for "sy". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Useful next steps

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

Full dictionary entry for "sus" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "sy" - compare definitions side by side with the headword page. Word entry
This pair ranks #194,293 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
"sus" and "sy" also get mixed up with nearby pairs, the highest-scored neighbour is "spy vs sy". Nearby pair

Confusion rank #194,293 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.