tiger nuts
kernel
A small nut.
bauple nut
Kola Nut
One nut beginning with F is filbert.
A beechnut is the nut of the beech tree - the small, triangular nut of the beech tree.
The scientific name of the Macadamia nut is Macadamia Intergrifolia, This scientific name pertains to the entire tree however, and not just the nut alone.
A tubing nut.
The Hindi name for ground nut is मूंगफली (Mungphali).
Unfortunate!
A "jelly nut" is a small, immature green coconut, which does not yet have a hard shell.
The scientific name for nut grass is Cyperus rotundus.