water hickory vs Carya aquatica

water hickory and Carya aquatica both are nouns.

Word	Noun	Adjective	Verb	Adverb
water hickory	Yes	No	No	No
Carya aquatica	Yes	No	No	No

As nouns, water hickory and Carya aquatica are synonyms defined as:

water hickory and Carya aquatica: hickory of southern United States having many narrow leaflets and rather bitter nuts

Other synonyms of water hickory include bitter pecan, water bitternut.

water hickory (noun)	Carya aquatica (noun)
hickory of southern United States having many narrow leaflets and rather bitter nuts	hickory of southern United States having many narrow leaflets and rather bitter nuts