snowdrop vs windflower

snowdrop and windflower both are nouns.

Word	Noun	Adjective	Verb	Adverb
snowdrop	Yes	No	No	No
windflower	Yes	No	No	No

As nouns, windflower is a hypernym of snowdrop; that is, windflower is a word with a broader meaning than snowdrop:

snowdrop: common anemone of eastern North America with solitary pink-tinged white flowers
windflower: any woodland plant of the genus Anemone grown for its beautiful flowers and whorls of dissected leaves

Other hypernyms of snowdrop include anemone.

snowdrop (noun)	windflower (noun)
common anemone of eastern North America with solitary pink-tinged white flowers	any woodland plant of the genus Anemone grown for its beautiful flowers and whorls of dissected leaves