1) Decease 2) Die before 3) Die earlier than 4) Exit 5) Expire 6) Pass 7) Pass away 8) Perish 9) To die sooner than 
v. to die before someone else, as "if my brother, Harry, should predecease me, his share of my estate I give to his son, Eugene."
• (v. t.) To die sooner than. • (n.) The death of one person or thing before another.
v.To pass away or meet death before someone else.Ex-if my wife should predecease me, her share of property would go to a trust.
Pre'de·cease` noun The death of one person or thing before another. [ R.] Brougham. Pre`de·cease transitive verb To die sooner than. 'If children predecease progenitors.' Shak. 
[v] - die before
to die before (another person, the occurrence of an event, etc.).