camellia vs shrub

camellia and shrub both are nouns.

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

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

camellia: any of several shrubs or small evergreen trees having solitary white or pink or reddish flowers
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of camellia include bush.

camellia (noun)	shrub (noun)
any of several shrubs or small evergreen trees having solitary white or pink or reddish flowers	a low woody perennial plant usually having several major stems