Myrica gale vs shrub

Myrica gale and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
Myrica gale	Yes	No	No	No
shrub	Yes	No	No	No

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

Myrica gale: bog shrub of north temperate zone having bitter-tasting fragrant leaves
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of Myrica gale include bush.

Myrica gale (noun)	shrub (noun)
bog shrub of north temperate zone having bitter-tasting fragrant leaves	a low woody perennial plant usually having several major stems