conker vs buckeye

conker and buckeye both are nouns.

Word	Noun	Adjective	Verb	Adverb
conker	Yes	No	No	No
buckeye	Yes	No	No	No

As nouns, conker and buckeye are synonyms defined as:

Other synonyms of conker include horse chestnut.

conker (noun)	buckeye (noun)
the inedible nutlike seed of the horse chestnut	tree having palmate leaves and large clusters of white to red flowers followed by brown shiny inedible seeds
	the inedible nutlike seed of the horse chestnut