macadamia nut tree vs macadamia nut

macadamia nut tree and macadamia nut both are nouns.

Word	Noun	Adjective	Verb	Adverb
macadamia nut tree	Yes	No	No	No
macadamia nut	Yes	No	No	No

As nouns, macadamia nut tree and macadamia nut are synonyms defined as:

macadamia nut tree and macadamia nut: small Australian tree with racemes of pink flowers; widely cultivated (especially in Hawaii) for its sweet edible nuts

Other synonyms of macadamia nut tree include Macadamia ternifolia.

macadamia nut tree (noun)	macadamia nut (noun)
small Australian tree with racemes of pink flowers; widely cultivated (especially in Hawaii) for its sweet edible nuts	nutlike seed with sweet and crisp white meat
	small Australian tree with racemes of pink flowers; widely cultivated (especially in Hawaii) for its sweet edible nuts