vegetable ivory vs apple nut

vegetable ivory and apple nut both are nouns.

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

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

vegetable ivory and apple nut: 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 vegetable ivory include ivory nut.

vegetable ivory (noun)	apple nut (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