fetter bush vs shrub

fetter bush and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
fetter bush	Yes	No	No	No
shrub	Yes	No	No	No

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

fetter bush: showy evergreen shrub of southeastern United States with shiny leaves and angled branches and clusters of pink to reddish flowers that resemble an umbel
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of fetter bush include bush.

fetter bush (noun)	shrub (noun)
showy evergreen shrub of southeastern United States with shiny leaves and angled branches and clusters of pink to reddish flowers that resemble an umbel	a low woody perennial plant usually having several major stems