Suit
This man is wearing a white suit.
Suits include jackets and pants or a skirt.
Both men and women wear suits.
Tuxedo
This man is wearing a black tuxedo.
A tuxedo is also called a tux.
Men wear tuxedos when they get married or go to formal dinners.
Gown
This is a green gown.
Women wear gowns to proms and formal dinners.
Gowns are longer than regular dresses.