Vinca rosea vs periwinkle

Vinca rosea and periwinkle both are nouns.

Word	Noun	Adjective	Verb	Adverb
Vinca rosea	Yes	No	No	No
periwinkle	Yes	No	No	No

As nouns, Vinca rosea and periwinkle are synonyms defined as:

Vinca rosea and periwinkle: commonly cultivated Old World woody herb having large pinkish to red flowers

Vinca rosea (noun)	periwinkle (noun)
commonly cultivated Old World woody herb having large pinkish to red flowers	edible marine gastropod
	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