pimiento vs bell pepper

pimiento and bell pepper both are nouns.

Word	Noun	Adjective	Verb	Adverb
pimiento	Yes	No	No	No
bell pepper	Yes	No	No	No

As nouns, pimiento and bell pepper are synonyms defined as:

pimiento and bell pepper: plant bearing large mild thick-walled usually bell-shaped fruits; the principal salad peppers

Other synonyms of pimiento include Capsicum annuum grossum, paprika, pimento, sweet pepper, sweet pepper plant.

pimiento (noun)	bell pepper (noun)
fully ripened sweet red pepper; usually cooked	large bell-shaped sweet pepper in green or red or yellow or orange or black varieties
plant bearing large mild thick-walled usually bell-shaped fruits; the principal salad peppers	plant bearing large mild thick-walled usually bell-shaped fruits; the principal salad peppers