bachelor's button vs flower

bachelor's button and flower both are nouns.

Word	Noun	Adjective	Verb	Adverb
bachelor's button	Yes	No	No	No
flower	Yes	No	Yes	No

As nouns, flower is a hypernym of bachelor's button; that is, flower is a word with a broader meaning than bachelor's button:

bachelor's button: an annual Eurasian plant cultivated in North America having showy heads of blue or purple or pink or white flowers
flower: a plant cultivated for its blooms or blossoms

As nouns, flower is a hypernym of bachelor's button; that is, flower is a word with a broader meaning than bachelor's button:

bachelor's button: tropical American herb having rose to red or purple flowers that can be dried without losing color
flower: a plant cultivated for its blooms or blossoms

bachelor's button (noun)	flower (noun)
an annual Eurasian plant cultivated in North America having showy heads of blue or purple or pink or white flowers	a plant cultivated for its blooms or blossoms
tropical American herb having rose to red or purple flowers that can be dried without losing color	reproductive organ of angiosperm plants especially one having showy or colorful parts
	the period of greatest prosperity or productivity

bachelor's button (verb)	flower (verb)
	produce or yield flowers