capsicum vs shrub

capsicum and shrub both are nouns.

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

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

capsicum: any of various tropical plants of the genus Capsicum bearing peppers
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of capsicum include bush.

capsicum (noun)	shrub (noun)
any of various tropical plants of the genus Capsicum bearing peppers	a low woody perennial plant usually having several major stems