periwinkle vs cayenne jasmine

periwinkle and cayenne jasmine both are nouns.

Word	Noun	Adjective	Verb	Adverb
periwinkle	Yes	No	No	No
cayenne jasmine	Yes	No	No	No

As nouns, periwinkle and cayenne jasmine are synonyms defined as:

periwinkle and cayenne jasmine: commonly cultivated Old World woody herb having large pinkish to red flowers

periwinkle (noun)	cayenne jasmine (noun)
edible marine gastropod	commonly cultivated Old World woody herb having large pinkish to red flowers
small edible marine snail; steamed in wine or baked
chiefly trailing poisonous plants with blue flowers
commonly cultivated Old World woody herb having large pinkish to red flowers