Wordology, Want, Wont and Won't

The first two words are pronounced the same, but mean two different things.

Want means ‘desire something’ or ‘wish for something': I want to stay here, he wants to speak, etc.

Wont means in the habit or tendency doing something, or of a characteristic of something. such as, “Tomorrow will be quiet, as Sundays are wont to be” or "He writes every day as he is wont to do."

Neither should be confused with the contraction of will not. Won't is used to express the future and meaning 'will not' as in, I won’t be here tomorrow.