silverberry vs silver berry

silverberry and silver berry both are nouns.

Word	Noun	Adjective	Verb	Adverb
silverberry	Yes	No	No	No
silver berry	Yes	No	No	No

As nouns, silverberry and silver berry are synonyms defined as:

silverberry and silver berry: deciduous unarmed North American shrub with silvery leaves and fruits

Other synonyms of silverberry include Elaeagnus commutata, silver-bush, silverbush.

silverberry (noun)	silver berry (noun)
deciduous unarmed North American shrub with silvery leaves and fruits	deciduous unarmed North American shrub with silvery leaves and fruits
	deciduous shrubby tree of Europe and western Asia having grey leaves and small yellow fruits covered in silvery scales; sometimes spiny