chili pepper vs chili

chili pepper and chili both are nouns.

Word	Noun	Adjective	Verb	Adverb
chili pepper	Yes	No	No	No
chili	Yes	No	No	No

As nouns, chili pepper and chili are synonyms defined as:

chili pepper and chili: very hot and finely tapering pepper of special pungency

Other synonyms of chili pepper include chile, chilli, chilly.

chili pepper (noun)	chili (noun)
very hot and finely tapering pepper of special pungency	very hot and finely tapering pepper of special pungency
plant bearing very hot and finely tapering long peppers; usually red	ground beef and chili peppers or chili powder often with tomatoes and kidney beans