What's the difference between earthnut and hawknut?

Earthnut

Definition:

• (n.) A name given to various roots, tubers, or pods grown under or on the ground
• (n.) The esculent tubers of the umbelliferous plants Bunium flexuosum and Carum Bulbocastanum.
• (n.) The peanut. See Peanut.

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Hawknut

Definition:

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