ivory nut vs vegetable ivory

ivory nut and vegetable ivory both are nouns.

Word	Noun	Adjective	Verb	Adverb
ivory nut	Yes	No	No	No
vegetable ivory	Yes	No	No	No

As nouns, ivory nut and vegetable ivory are synonyms defined as:

ivory nut and vegetable ivory: nutlike seed of a South American palm; the hard white shell takes a high polish and is used for e.g. buttons

Other synonyms of ivory nut include apple nut.

ivory nut (noun)	vegetable ivory (noun)
nutlike seed of a South American palm; the hard white shell takes a high polish and is used for e.g. buttons	nutlike seed of a South American palm; the hard white shell takes a high polish and is used for e.g. buttons