cowberry vs cranberry

cowberry and cranberry both are nouns.

Word	Noun	Adjective	Verb	Adverb
cowberry	Yes	No	No	No
cranberry	Yes	No	No	No

As nouns, cranberry is a hypernym of cowberry; that is, cranberry is a word with a broader meaning than cowberry:

cowberry: low evergreen shrub of high north temperate regions of Europe and Asia and America bearing red edible berries
cranberry: any of numerous shrubs of genus Vaccinium bearing cranberries

cowberry (noun)	cranberry (noun)
tart red berries similar to American cranberries but smaller	very tart red berry used for sauce or juice
low evergreen shrub of high north temperate regions of Europe and Asia and America bearing red edible berries	any of numerous shrubs of genus Vaccinium bearing cranberries