sparkleberry vs blueberry

sparkleberry and blueberry both are nouns.

Word	Noun	Adjective	Verb	Adverb
sparkleberry	Yes	No	No	No
blueberry	Yes	No	No	No

As nouns, blueberry is a hypernym of sparkleberry; that is, blueberry is a word with a broader meaning than sparkleberry:

sparkleberry: shrub or small tree of eastern United States having black inedible berries
blueberry: any of numerous shrubs of the genus Vaccinium bearing blueberries

Other hypernyms of sparkleberry include blueberry bush.

sparkleberry (noun)	blueberry (noun)
shrub or small tree of eastern United States having black inedible berries	sweet edible dark-blue berries of either low-growing or high-growing blueberry plants
	any of numerous shrubs of the genus Vaccinium bearing blueberries