1. Cayenne Pepper
Cayenne pepper can be a suitable alternative to chili powder in various dishes. Especially in those dishes where you want to add heat without the complex flavor profile of a chili powder blend. Its versatility makes it suitable for spice rubs, particularly for meats to impart heat.
Both cayenne pepper and chili powder are made from dried chili peppers, and they contribute a level of spiciness to dishes. However, remember that cayenne pepper is hotter than many chili powders, so start with a small amount and adjust to your preferred spice level.