long pepper vs chilli pepper

long pepper and chilli pepper both are nouns.

Word	Noun	Adjective	Verb	Adverb
long pepper	Yes	No	No	No
chilli pepper	Yes	No	No	No

As nouns, long pepper and chilli pepper are synonyms defined as:

long pepper and chilli pepper: plant bearing very hot and finely tapering long peppers; usually red

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

long pepper (noun)	chilli pepper (noun)
plant bearing very hot and finely tapering long peppers; usually red	plant bearing very hot and finely tapering long peppers; usually red
slender tropical climber of the eastern Himalayas