white titi vs shrub

white titi and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
white titi	Yes	No	No	No
shrub	Yes	No	No	No

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

white titi: shrub or small tree of southeastern United States to West Indies and Brazil; grown for the slender racemes of white flowers and orange and crimson foliage
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of white titi include bush.

white titi (noun)	shrub (noun)
shrub or small tree of southeastern United States to West Indies and Brazil; grown for the slender racemes of white flowers and orange and crimson foliage	a low woody perennial plant usually having several major stems