sweet pepper vs paprika

sweet pepper and paprika both are nouns.

Word	Noun	Adjective	Verb	Adverb
sweet pepper	Yes	No	No	No
paprika	Yes	No	No	No

As nouns, sweet pepper and paprika are synonyms defined as:

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

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

sweet pepper (noun)	paprika (noun)
large mild crisp thick-walled capsicum peppers usually bell-shaped or somewhat oblong; commonly used in salads	a mild powdered seasoning made from dried pimientos
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