so's vs SPS, What's the Difference?

Which to use

“so's” is a contraction and “SPS” is a noun - they look or sound alike but fill different roles in a sentence.

#38,171
“so's” frequency rank: #34,299
“SPS” frequency rank: 72470
confusion score

Side-by-Side Comparison

Feature	so's	SPS
Definition	So that, in order that.	Initialism of supplementary policy statement.

Letter map: so's vs SPS

Shared letters muted; letters that set so's and SPS apart highlighted. Shared run: 2.

4 ch

so's

3 ch

SPS

Role in the sentence - so's and SPS

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: so's is acontraction and SPSanoun. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 72470, derived from the frequency rank of both members and their visual similarity.

so's is recorded at frequency rank #38,171, classified as acontraction. SPS is at rank #34,299, tagged as anoun.

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 72470, this pair ranks #42,892 of 530,003 scored English confusable pairs - among the most confusable pairs.

Orthographic DNA of so's vs SPS

Shared letters: s. Private to "so's": o. Private to "SPS": p.

"so's" · 3 letters · shape CVC · "SPS" · 3 letters · shape CCC

Frequently Asked Questions

Can "so's" and "SPS" be used interchangeably?

No - they are not even the same part of speech. "so's" is a contraction and "SPS" a noun, so a sentence built for one is usually ungrammatical with the other.

In ordinary English text, does "so's" or "SPS" show up more?

"SPS" is the more common of the two: it sits at frequency rank #34,299 in our English list, against #38,171 for "so's". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Done with this confusable. These links stay specific to "so's" and "SPS".

Full dictionary entry for "so's" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "SPS" - compare definitions side by side with the headword page. Word entry
This pair ranks #42,892 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
"so's" and "SPS" also get mixed up with nearby pairs, the highest-scored neighbour is "so's vs suds". Nearby pair

Confusion rank #42,892 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.