Wont can be a noun, adjective or verb, depending on context. As a noun it refers to someone's habitual way.

Our word of the day is spelled like won’t without the apostrophe and is pronounced like W-A-N-T, but its meaning and origin is different from both of those words. Coming from Old English, wont — W-O-N-T — means a person’s customary behavior in a given situation.

Charlie’s custom of practicing the drums at five-thirty in the morning can be pretty irritating. But there’s nothing you can say to persuade him to stop. This is simply his wont and you can’t change it.