Usage: 2 forms in 9 verses
Form Translated As     In Verse(s)
συναντήματά my events LXX.Exod.9.14
συνάντημα event LXX.1Kgs.8.37LXX.Eccl.2.14LXX.Eccl.2.15LXX.Eccl.3.19LXX.Eccl.3.19LXX.Eccl.3.19LXX.Eccl.9.2LXX.Eccl.9.3

Liddell-Scott-Jones

συνάντημα (sunantēma) an event G:N-N

συνάντημα-ημα, ατος, τό,

incident, occurrence,[LXX]

__2 visitation, of plague, etc.,[LXX]; σ. νυκτερινόν nightmare, [Refs 1st c.AD+]
__3 confirmation, in plural, [Refs 1st c.BC+]

LSJ Scripture Refs: LXX.Eccl.9.2LXX.Exod.9.14