golden thread vs goldthread

golden thread and goldthread both are nouns.

Word	Noun	Adjective	Verb	Adverb
golden thread	Yes	No	No	No
goldthread	Yes	No	No	No

As nouns, golden thread and goldthread are synonyms defined as:

golden thread and goldthread: low-growing perennial of North America woodlands having trifoliate leaves and yellow rootstock and white flowers

Other synonyms of golden thread include Coptis groenlandica, Coptis trifolia groenlandica.

golden thread (noun)	goldthread (noun)
low-growing perennial of North America woodlands having trifoliate leaves and yellow rootstock and white flowers	low-growing perennial of North America woodlands having trifoliate leaves and yellow rootstock and white flowers