Hair dye is a common term used for a product that colors hair. However, there are several other synonyms that can be used to refer to hair dye. One of the most commonly used synonyms for hair dye is hair color. Hair coloring agents come in various shades and tones and are used to alter the hair color. Another synonym used to refer to hair dye is hair tint. It is used to add highlights or lowlights to the hair for a subtle change. Hair coloring can also be referred to as hair stain or hair shade. All of these synonyms are commonly used to refer to any product that changes the color of hair.