Lady
Part of speech: noun
Definition: The mistress of a household. A woman of breeding or higher class, a woman of authority. The feminine of lord. A polite term referring to a woman. (ladies; in plural only) A polite form of address to women (singular) A highly colloquial and/or impolite form of address to a woman. (ladies' or ladies) Toilets intended for use by women. An affectionate term for one's wife or girlfriend. a queen (the playing card) (attributive) (with a professional title) Who is a woman.
Madam
Part of speech: noun
Definition: A polite form of address for a woman or lady.The mistress of a household.A conceited or quarrelsome girl.A woman who runs a brothel.
Example sentence: Like so many women aspiring and working to create the life they desire, Madam Walker lived with a vision that was beyond her time - a vision for the way that things could be, not the way they were.