wild rosemary vs shrub

wild rosemary and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
wild rosemary	Yes	No	No	No
shrub	Yes	No	No	No

As nouns, shrub is a hypernym of wild rosemary; that is, shrub is a word with a broader meaning than wild rosemary:

wild rosemary: bog shrub of northern and central Europe and eastern Siberia to Korea and Japan
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of wild rosemary include bush.

wild rosemary (noun)	shrub (noun)
bog shrub of northern and central Europe and eastern Siberia to Korea and Japan	a low woody perennial plant usually having several major stems