waivswhoWhat's the difference?

Quick tell: wai is a noun, who is a pronoun, so they fill different roles in a sentence.

Which to use

“wai” is a noun and “who” is a pronoun - they look or sound alike but fill different roles in a sentence.

#24,637
“wai” frequency rank
#53
“who” frequency rank
24690
confusion score

Side-by-Side Comparison

Feature wai who
Definition A Thai greeting wherein the palms are brought together in front of the face or chest, sometimes accompanied with a bow. What person or people; which person or people; asks for the identity of someone; used in a direct or indirect question.

Where the eye mixes wai and who

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

3 ch
wai
3 ch
who

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: wai is /waɪ/ while who is /huː/. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (noun vs pronoun), which is usually the fastest check. Our composite confusion score for this pair is 24690, derived from the frequency rank of both members and their visual similarity.

wai is recorded at frequency rank #24,637, classified as anoun, pronounced /waɪ/. who is at rank #53, tagged as apron, pronounced /huː/.

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 24690, this pair ranks #400,103 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of wai vs who

Shared letters: w. Private to "wai": ai. Private to "who": ho.

"wai" · 3 letters · shape CVV  ·  "who" · 3 letters · shape CCV

Frequently Asked Questions

Can "wai" and "who" be used interchangeably?
No - they are not even the same part of speech. "wai" is a noun and "who" a pronoun, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "wai" or "who"?
"who" is the more common of the two: it sits at frequency rank #53 in our English list, against #24,637 for "wai". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

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

Source: FrequencyWords open word-frequency list