bridal wreath vs Saint Peter's wreath

bridal wreath and Saint Peter's wreath both are nouns.

Word	Noun	Adjective	Verb	Adverb
bridal wreath	Yes	No	No	No
Saint Peter's wreath	Yes	No	No	No

As nouns, bridal wreath and Saint Peter's wreath are synonyms defined as:

bridal wreath and Saint Peter's wreath: shrub having copious small white flowers in spring

Other synonyms of bridal wreath include bridal-wreath, Spiraea prunifolia, St. Peter's wreath.

bridal wreath (noun)	Saint Peter's wreath (noun)
shrub having copious small white flowers in spring	shrub having copious small white flowers in spring
Chilean evergreen shrub having delicate spikes of small white flowers