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.
"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)
By tradition, the Committee elects the Board of Governors chairperson as its chairperson and the New York Reserve Bank president as its vice chairperson.
Honourable Mandarossa
How do you use chairperson in a sentence?
Senators are Canadians who are at least thirty years old, having at least $4000 of property, appointed to the Senate by the Governor General on the advice of the prime minister. Canadian senators review bills passed by the elected House of Commons, and pass them, reject them, or suggest amendments to improve legislation.
In my experience and from person preference "Madam Chairman" is the best. Another option is "Chairperson."