your best best is to call them share and settings.
technically speaking, the first is "Share Action Provider" and links to all apps that can use the share function (messaging, facebook, twitter or whatever).
and the second is the overflow, this is where anything that doesn't fit in the bar will go. Like if you only have two things you wont have that. So its the less important stuff, and usually ends u being settings, but it varies from app to app.
Also, the icons can be different(like the settings or dots thing dontpanicbobby mentioned).
source-making apps.