hard-shelled seed

NUT
WordClue
RAPsharp blow with something hard
BRANhard outer layers of cereal grain
DISCcompact or hard
HULLThe outer covering of a fruit or seed
FLINThard form of quartz
SHELLhard external covering of an animal
HELMEThard hat
PRINTOUThard copy
ADVERSITYhard life
BRANhard outer layers of cereal grain
WARRENHarding, US president