bitter hickory vs swamp hickory

bitter hickory and swamp hickory both are nouns.

Word	Noun	Adjective	Verb	Adverb
bitter hickory	Yes	No	No	No
swamp hickory	Yes	No	No	No

As nouns, bitter hickory and swamp hickory are synonyms defined as:

bitter hickory and swamp hickory: hickory of the eastern United States having a leaves with 7 or 9 leaflets and thin-shelled very bitter nuts

Other synonyms of bitter hickory include bitter pignut, bitternut, bitternut hickory, Carya cordiformis.

bitter hickory (noun)	swamp hickory (noun)
hickory of the eastern United States having a leaves with 7 or 9 leaflets and thin-shelled very bitter nuts	hickory of the eastern United States having a leaves with 7 or 9 leaflets and thin-shelled very bitter nuts