brazil-nut tree vs brazil nut

brazil-nut tree and brazil nut both are nouns.

Word	Noun	Adjective	Verb	Adverb
brazil-nut tree	Yes	No	No	No
brazil nut	Yes	No	No	No

As nouns, brazil-nut tree and brazil nut are synonyms defined as:

brazil-nut tree and brazil nut: tall South American tree bearing brazil nuts

Other synonyms of brazil-nut tree include Bertholletia excelsa.

brazil-nut tree (noun)	brazil nut (noun)
tall South American tree bearing brazil nuts	three-sided tropical American nut with white oily meat and hard brown shell
	tall South American tree bearing brazil nuts