silver vine vs silvervine

silver vine and silvervine both are nouns.

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

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

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

Other synonyms of silver vine include Actinidia polygama.

silver vine (noun)	silvervine (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