Capsicum annuum longum vs chili pepper

Capsicum annuum longum and chili pepper both are nouns.

Word	Noun	Adjective	Verb	Adverb
Capsicum annuum longum	Yes	No	No	No
chili pepper	Yes	No	No	No

As nouns, Capsicum annuum longum and chili pepper are synonyms defined as:

Capsicum annuum longum and chili pepper: plant bearing very hot and finely tapering long peppers; usually red

Other synonyms of Capsicum annuum longum include cayenne, cayenne pepper, chilli pepper, jalapeno, long pepper.

Capsicum annuum longum (noun)	chili pepper (noun)
plant bearing very hot and finely tapering long peppers; usually red	very hot and finely tapering pepper of special pungency
	plant bearing very hot and finely tapering long peppers; usually red