I.
n.
1.
Occurrence, incident, casualty, event.
2.
Opportunity, convenience, juncture, conjuncture, opening, suitable time, favorable time, nick of time, golden opportunity.
3.
Necessity, need, exigency, requirement, want.
4.
Cause (incidental), ground, reason.
5.
Motive, reason, inducement, influence.
6.
Circumstances, juncture, exigency.
II.
v. a.
1.
Cause, produce, originate, breed, create, bring about, give rise to, give occasion to, bring to pass, be the cause of.
2.
Induce, influence, persuade, move.