valerian vs flower

valerian and flower both are nouns.

Word	Noun	Adjective	Verb	Adverb
valerian	Yes	No	No	No
flower	Yes	No	Yes	No

As nouns, flower is a hypernym of valerian; that is, flower is a word with a broader meaning than valerian:

valerian: a plant of the genus Valeriana having lobed or dissected leaves and cymose white or pink flowers
flower: a plant cultivated for its blooms or blossoms

valerian (noun)	flower (noun)
a plant of the genus Valeriana having lobed or dissected leaves and cymose white or pink flowers	a plant cultivated for its blooms or blossoms
	reproductive organ of angiosperm plants especially one having showy or colorful parts
	the period of greatest prosperity or productivity

valerian (verb)	flower (verb)
	produce or yield flowers