WordNet sense 1 (a formal entry into an organization or position or office):

induction, installation

WordNet sense 2 (wisdom as evidenced by the possession of knowledge):

knowledgeability, knowledgeableness

WordNet sense 3 (the act of starting something for the first time; introducing something new):

creation, foundation, innovation, instauration, institution, introduction, origination, founding

WordNet sense 4 (an act that sets in motion some course of events):

trigger