protea vs shrub

protea and shrub both are nouns.

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

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

protea: any tropical African shrub of the genus Protea having alternate rigid leaves and dense colorful flower heads resembling cones
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of protea include bush.

protea (noun)	shrub (noun)
any tropical African shrub of the genus Protea having alternate rigid leaves and dense colorful flower heads resembling cones	a low woody perennial plant usually having several major stems