Malcolm stock vs flower

Malcolm stock and flower both are nouns.

Word	Noun	Adjective	Verb	Adverb
Malcolm stock	Yes	No	No	No
flower	Yes	No	Yes	No

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

Malcolm stock: any of various ornamental flowering plants of the genus Malcolmia
flower: a plant cultivated for its blooms or blossoms

Malcolm stock (noun)	flower (noun)
any of various ornamental flowering plants of the genus Malcolmia	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

Malcolm stock (verb)	flower (verb)
	produce or yield flowers