silverbell tree vs silver-bell tree

silverbell tree and silver-bell tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
silverbell tree	Yes	No	No	No
silver-bell tree	Yes	No	No	No

As nouns, silverbell tree and silver-bell tree are synonyms defined as:

silverbell tree and silver-bell tree: medium-sized tree of West Virginia to Florida and Texas

Other synonyms of silverbell tree include Halesia carolina, Halesia tetraptera, opossum wood, snowdrop tree.

silverbell tree (noun)	silver-bell tree (noun)
medium-sized tree of West Virginia to Florida and Texas	medium-sized tree of West Virginia to Florida and Texas