In Ukrainian language the word with same pronunciation as the word "mad" is a word that means "honey".
And about English...
madness means a state of a person when he cannot control himself. For example, someone troll you, you have a frustration, and the troll asks you: "u mad, man?" (with trollface).
And craziness is a kind of wrong thinking. For example, you eat green bananas. If you eat such bananas I shall tell you: "you're crazy!" eat yellow bananas, it's more tasty!" but you're not mad, you just used to eat green yellow bananas and now you don't want to change your habit.