long pepper vs jalapeno

long pepper and jalapeno both are nouns.

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

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

long pepper and jalapeno: 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, chilli pepper.

long pepper (noun)	jalapeno (noun)
plant bearing very hot and finely tapering long peppers; usually red	hot green or red pepper of southwestern United States and Mexico
slender tropical climber of the eastern Himalayas	plant bearing very hot and finely tapering long peppers; usually red