Period of intentional sleeplessness

VIGIL
List of words for the clue Period of intentional sleeplessness from the crossword:
PEA RIP SOD SPA LIES ESPN DEED ARSON ROAST ERA EON LENT EPOCH ICEAGE AEON AGE YEAR TERM DAY
WordClue
AGEera, period
ERAperiod, epoch
NAPshort period of sleep
LULLperiod of rest
STILLperiod of calm
INFANCYperiod of childhood
PERMIANgeologic period
CAMBRIANgeologic period
DEVONIANgeologic period
DOWNTIMEperiod when a system is unavailable
INSOMNIAsleeplessness
INTERVALperiod, pause
JURASSICgeologic period
SILURIANgeologic period
TIMESPANperiod
TRIASSICgeologic period
PALEOGENEgeologic period
CRETACEOUSgeologic period
ORDOVICIANgeologic period
CARBONIFEROUSgeologic period
FREEZEperiod of intensely cold weather
LULLperiod of rest