is a specific kind of: wood.

is contained in: hickoryⁿ², hickory tree.

is a specific kind of: nut tree.

is a broader term that covers: bitter pecan, Carya aquatica, water bitternut, water hickory | black hickory, brown hickory, Carya glabra, pignut, pignut hickory | bitter hickory, bitter pignut, bitternut, bitternut hickory, Carya cordiformis, swamp hickory | big shagbark, big shellbark, big shellbark hickory, Carya laciniosa, king nut, king nut hickory | Carya myristicaeformis, Carya myristiciformis, nutmeg hickory | Carya ovata, shagbark, shagbark hickory, shellbark, shellbark hickory | big-bud hickory, black hickory, Carya tomentosa, mockernut, mockernut hickory, white-heart hickory.

is a member of: Carya, genus Carya.

contains: hickoryⁿ¹.