The term "chairperson" is more inclusive and gender-neutral, so it is generally preferred over "chairman" or "chairwoman." It is appropriate to use "chairperson" to refer to the individual leading a meeting or organization, regardless of gender.
They are two different spellings of the same word.The US spelling is honorable, the UK spelling is honourable.
閣下 - Kakka
Only if they have the same sense of humor as you do. If not them no because it's rude and they may think your trying to insult them. i wouldn't recommend addressing someone as Mr. Chairperson.
The plural of chairperson is chairpersons.
By tradition, the Committee elects the Board of Governors chairperson as its chairperson and the New York Reserve Bank president as its vice chairperson.
"Governor" is typically prefixed with "Honorable" in American English, while in British English it is prefixed with "Honourable." Both spellings are correct; it depends on the regional variation of English being used.
In the English peerage it is "The Most Honourable the Marquis of...." (or The Most Hon. the Marquis of as an abbreviation)
How do you use chairperson in a sentence?
Honourable Mandarossa
In my experience and from person preference "Madam Chairman" is the best. Another option is "Chairperson."
Rajnath Singh is BJP Party chairperson