bridal-wreath vs shrub

bridal-wreath and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
bridal-wreath	Yes	No	No	No
shrub	Yes	No	No	No

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

bridal-wreath: Chilean evergreen shrub having delicate spikes of small white flowers
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of bridal-wreath include bush.

bridal-wreath (noun)	shrub (noun)
shrub having copious small white flowers in spring	a low woody perennial plant usually having several major stems
Chilean evergreen shrub having delicate spikes of small white flowers