macadamia

As a noun macadamia

is .

As a proper noun hazel is

from the plant or colour hazel popular in the us at the turn of the 20th century.

As nouns the difference between acorn and macadamia

is that acorn is the fruit of the oak, being an oval nut growing in a woody cup or cupule while macadamia is .

As nouns the difference between macadamia and hazelnut

is that macadamia is an evergreen tree, of the genus Macadamia, native to Australia and cultivated in Hawaii while hazelnut is the fruit of the hazel tree.