Collocations for biscuit - noun

dry, hard (both BrE)
flaky (AmE)
stale
fresh
chocolate, coconut, ginger, etc. (all BrE)
digestive, shortbread, wafer (all BrE)
home-made
breakfast (AmE)
hot (AmE)
dog

box, packet, tin (all BrE)
a packet of coconut biscuits

eat, have
nibble (esp. BrE)
dunk (BrE)
Frank always dunks his biscuits in his tea.

bake, make
cut out (BrE)
He was cutting biscuits out and putting them on a baking tray.

barrel, tin (both BrE)
crumbs
He brushed the biscuit crumbs from his jacket.

cheese and biscuits (BrE)
biscuits and gravy (AmE)