periwinkle vs periwinkle

periwinkle and periwinkle both are nouns.

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

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