buckeye vs Aesculus hippocastanum

buckeye and Aesculus hippocastanum both are nouns.

Word	Noun	Adjective	Verb	Adverb
buckeye	Yes	No	No	No
Aesculus hippocastanum	Yes	No	No	No

As nouns, buckeye and Aesculus hippocastanum are synonyms defined as:

buckeye and Aesculus hippocastanum: tree having palmate leaves and large clusters of white to red flowers followed by brown shiny inedible seeds

Other synonyms of buckeye include horse chestnut.

buckeye (noun)	Aesculus hippocastanum (noun)
tree having palmate leaves and large clusters of white to red flowers followed by brown shiny inedible seeds	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