mimosa vs shrub

mimosa and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
mimosa	Yes	No	No	No
shrub	Yes	No	No	No

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

mimosa: any of various tropical shrubs or trees of the genus Mimosa having usually yellow flowers and compound leaves
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of mimosa include bush.

mimosa (noun)	shrub (noun)
a mixed drink containing champagne and orange juice	a low woody perennial plant usually having several major stems
any of various tropical shrubs or trees of the genus Mimosa having usually yellow flowers and compound leaves
evergreen Australasian tree having white or silvery bark and young leaves and yellow flowers