horse chestnut vs Aesculus hippocastanum

horse chestnut and Aesculus hippocastanum both are nouns.

Word	Noun	Adjective	Verb	Adverb
horse chestnut	Yes	No	No	No
Aesculus hippocastanum	Yes	No	No	No

As nouns, horse chestnut and Aesculus hippocastanum are synonyms defined as:

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

Other synonyms of horse chestnut include buckeye.

horse chestnut (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