silvervine vs silver vine

silvervine and silver vine both are nouns.

Word	Noun	Adjective	Verb	Adverb
silvervine	Yes	No	No	No
silver vine	Yes	No	No	No

As nouns, silvervine and silver vine are synonyms defined as:

silvervine and silver vine: ornamental vine of eastern Asia having yellow edible fruit and leaves with silver-white markings

Other synonyms of silvervine include Actinidia polygama.

silvervine (noun)	silver vine (noun)
ornamental vine of eastern Asia having yellow edible fruit and leaves with silver-white markings	ornamental vine of eastern Asia having yellow edible fruit and leaves with silver-white markings