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