Synonyms for Chili 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, cayenne pepperWordNet sense 2 (very hot and finely tapering pepper of special pungency):
Chile, chili, chilly, chilliFrom the ODE community, based on WordNetadd/edit