golden rain vs common laburnum

golden rain and common laburnum both are nouns.

Word	Noun	Adjective	Verb	Adverb
golden rain	Yes	No	No	No
common laburnum	Yes	No	No	No

As nouns, golden rain and common laburnum are synonyms defined as:

golden rain and common laburnum: an ornamental shrub or tree of the genus Laburnum; often cultivated for Easter decorations

Other synonyms of golden rain include golden chain, Laburnum anagyroides.

golden rain (noun)	common laburnum (noun)
an ornamental shrub or tree of the genus Laburnum; often cultivated for Easter decorations	an ornamental shrub or tree of the genus Laburnum; often cultivated for Easter decorations