Open English Wordnet
Nouns
(n)introduction, debut, first appearance, launching, unveiling, entrythe act of beginning something new“they looked forward to the debut of their new product line”
(n)initiation, founding, foundation, institution, origination, creation, innovation, introduction, instaurationthe act of starting something for the first time; introducing something new“she looked forward to her initiation as an adult”, “the foundation of a new scientific society”