whatsvswhy'sWhat's the difference?

Quick tell: whats is a noun, why's is a contraction, so they fill different roles in a sentence.

Which to use

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

#8,625
“whats” frequency rank
#28,792
“why's” frequency rank
37417
confusion score

Side-by-Side Comparison

Feature whats why's
Definition plural of what; used as a stand-in to collectively pluralize arbitrary instances of things. Often used along with whys, hows, etc. Contraction of why + is.

Letter map: whats vs why's

Shared letters muted; letters that set whats and why's apart highlighted. Shared run: 3. whats runs 5 letters (CCVCC) against why's's 4 (CCVC) - the length gap alone is often enough to separate them once you know to check it.

5 ch
whats
5 ch
why's

Part-of-speech tell for whats / why's

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: whats is anoun and why'sacontraction. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 37417, derived from the frequency rank of both members and their visual similarity.

whats is recorded at frequency rank #8,625, classified as anoun. why's is at rank #28,792, tagged as acontraction.

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 37417, this pair ranks #294,759 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of whats vs why's

Shared letters: hsw. Private to "whats": at. Private to "why's": y.

"whats" · 5 letters · shape CCVCC  ·  "why's" · 4 letters · shape CCVC

Known mistypes of this pair

  • whats ← hwats · wahts · whast · whatss · whatts · whhats · whtas · wwhats

Frequently Asked Questions

Do "whats" and "why's" mean the same thing in a sentence?
No - they are not even the same part of speech. "whats" is a noun and "why's" a contraction, so a sentence built for one is usually ungrammatical with the other.
In ordinary English text, does "whats" or "why's" show up more?
"whats" is the more common of the two: it sits at frequency rank #8,625 in our English list, against #28,792 for "why's". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Pair "whats" vs "why's" is on the table, pick a follow-up below.

  • Full dictionary entry for "whats" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "why's" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #294,759 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "whats" and "why's" also get mixed up with nearby pairs, the highest-scored neighbour is "why's vs Whyte". 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 #294,759 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list