Synonyms for Cayenne Pepper (same or very similar meaning)
WordNet sense 1 (plant bearing very hot and finely tapering long peppers; usually red):
cayenne, jalapeno, long pepper, Capsicum annuum longum, chilli pepper, chili pepperWordNet sense 2 (ground pods and seeds of pungent red peppers of the genus Capsicum):
red pepperFrom the ODE community, based on WordNetadd/edit