ambiguity or inadequacy in a system

LOOPHOLE
WordClue
GUTdigestive system
NOSEpart of respiratory system
PONSpart of nervous system
BRAINpart of nervous system
COMETicy small Solar System body
LIVERpart of digestive system
LUNGSpart of respiratory system
MOUTHpart of digestive system
ORDERsystem, symmetry
ESOPHAGUSpart of digestive system
MESENTERYpart of digestive system
PROMOTIONadvancement in rank or position
STRUCTUREsystem, arrangement
CEREBELLUMpart of nervous system
GALLBLADERpart of digestive system
OROPHARYNXpart of digestive system
AMPHETAMINEcentral nervous system stimulant
NASOPHARYNXpart of respiratory system
DIENCEPHALONpart of nervous system
NEUROSCIENCEscientific study of the nervous system
ATMOSPHEREambiance, feeling
DRIVEambition