bell pepper vs pimento

bell pepper and pimento both are nouns.

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

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

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

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

bell pepper (noun)	pimento (noun)
large bell-shaped sweet pepper in green or red or yellow or orange or black varieties	fully ripened sweet red pepper; usually cooked
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