'''Hognut''' or '''pignut''' can mean any of a number of unrelated plants:

* ''Bunium bulbocastanum'' (black cumin) or ''Conopodium majus'' (kippernut) of the Apiaceae * rushpeas, particularly ''Hoffmannseggia glauca'' (Indian rushpea) and ''Hoffmannseggia densiflora'', of the Fabaceae * ''Carya glabra'' (pignut hickory) of the Juglandaceae * ''Hyptis suaveolens'' (chan), also known as Mesosphaerum suaveolens, of the Lamiaceae

'''pig nut''' may also refer to pelleted Animal feed designed for pigs.

{{plant common name}}