| beechnut | (noun) small sweet triangular nut of any of various beech trees | - |
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| doughnut | (noun) a small ring-shaped friedcake | Synonyms: donut, sinker |
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| (noun) a toroidal shape | Synonyms: anchor ring, annulus, halo, ring |
| earthnut | (noun) edible subterranean fungus of the genus Tuber | Synonyms: truffle |
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| (noun) pod of the peanut vine containing usually 2 nuts or seeds; `groundnut' and `monkey nut' are British terms | Synonyms: goober, goober pea, groundnut, monkey nut, peanut |
| (noun) a common European plant having edible tubers with the flavor of roasted chestnuts | Synonyms: Conopodium denudatum |
| (noun) any of various highly prized edible subterranean fungi of the genus Tuber; grow naturally in southwestern Europe | Synonyms: earth-ball, truffle |