The beginning of an activity

START
List of words for the clue The beginning of an activity from the crossword:
PRE ANTI ONSET NEO ACTI AERO HIVE UNI TELE SEED INTRO ESS SEMI ECO ASOF ADO ABET YOGA ONCE
WordClue
EBBThe receding movement of the tide
RYEThe Catcher in the ...
SEAThe Old Man and the ...
TOMThe male of the domesticated cat
GUNSThe ... of Navarone (film)
RUMPThe hindquarters of an animal
UGLYThe Goood, the Bad and the ...
ERATOone of the muses
LAMBSThe Silence of the ... (film)
PRIDEone of the seven deadly sins
SCALPThe top of the head
USAGEThe manner or the amount of using
GALAXYGuardians of the ... (film)
PALATEThe roof of the mouth
RARITYmeasure of the scarcity of an object
JUBILEEcommemoration of an event
NURSINGactivity within the health care sector
SCABBARDThe sheath of a sword
MATRIMONYthe state of being married
PNEUMONIAinflammatory condition of the lung
YUANThe basic unit of money in China
ORIGINThe beginning of something