bitternut hickory vs swamp hickory

bitternut hickory and swamp hickory both are nouns.

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

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

bitternut 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 bitternut hickory include bitter hickory, bitter pignut, bitternut, Carya cordiformis.

bitternut 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