monkey nut vs groundnut

monkey nut and groundnut both are nouns.

Word	Noun	Adjective	Verb	Adverb
monkey nut	Yes	No	No	No
groundnut	Yes	No	No	No

As nouns, monkey nut and groundnut are synonyms defined as:

monkey nut and groundnut: pod of the peanut vine containing usually 2 nuts or seeds; `groundnut' and `monkey nut' are British terms

Other synonyms of monkey nut include earthnut, goober, goober pea, peanut.

monkey nut (noun)	groundnut (noun)
pod of the peanut vine containing usually 2 nuts or seeds; `groundnut' and `monkey nut' are British terms	nutlike tuber; important food of Native Americans
	pod of the peanut vine containing usually 2 nuts or seeds; `groundnut' and `monkey nut' are British terms
	a North American vine with fragrant blossoms and edible tubers; important food crop of Native Americans