gerardia vs flower

gerardia and flower both are nouns.

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

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

gerardia (noun)	flower (noun)
any plant of the genus Gerardia	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

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