winterberry vs holly

winterberry and holly both are nouns.

Word	Noun	Adjective	Verb	Adverb
winterberry	Yes	No	No	No
holly	Yes	No	No	No

As nouns, holly is a hypernym of winterberry; that is, holly is a word with a broader meaning than winterberry:

winterberry: deciduous shrub of southeastern and central United States
holly: any tree or shrub of the genus Ilex having red berries and shiny evergreen leaves with prickly edges

winterberry (noun)	holly (noun)
deciduous shrub of southeastern and central United States	any tree or shrub of the genus Ilex having red berries and shiny evergreen leaves with prickly edges