Choose the word which is different from the rest.

The answer is D. Red.

Crimson, scarlet, and vermillion are all shades of red. Crimson is a deep, rich red, while scarlet is a bright, vivid red. Vermillion is a reddish-orange color.

Red is a primary color, and it is the color of blood, fire, and love. It is also the color of danger, anger, and passion.