happener

noun4

1. •
   A person who makes things happen.

   • Goodparley says, 'O no and in deed he aint hes bettern clevver hes a mover hes a happener. […]' — 1998
2. •
   A person to whom things happen.

   • "No way! He's not one of these people that do things. There's two kinds of people—the doers and the happeners. He's a happener. You know, things happen to him instead." — 1984
3. •
   (old-fashioned) One who participates in a happening.
4. •
   An event that is expected to happen; a plan that is likely to succeed.

   • The planned access via Netizen appears not to be a happener. — 1999