cod-liver or mineral

OIL
WordClue
OPALsilica mineral
WOOLmineral or sheep
BRAINhepatology - liver, neurology - ?
COURTappellate or supreme
DANCEtango or flamenco
FLUIDwater or petroleum
HEARThepatology - liver, cardiology - ?
MOTORdiesel or stepping
ORDERfungus or stop-loss
PARTYRepublican or Conservative
POWERsolar or of will
RIVERNeva or Mekong
SHALEcod or pod
TEETHhepatology - liver, stomatology - ?
TOPAZnesosilicate mineral
HEPATITISinflammation of the liver tissue
NEUROLOGYliver - hepatology, brain - ?
CARDIOLOGYliver - hepatology, heart - ?
HEPATOLOGYteeth - stomatology, liver - ?
STOMATOLOGYliver - hepatology, teeth - ?
JEANCocteau, French writer
SHALEcod or pod