Answer:
My first is in window but not in pane. My second's in road but not in lane. My third is in oval but not in round. My fourth is in hearing but not in sound. My whole is known as a sign of peace. And from noah's ark won quick release.
There is one in every corner and two in every room.
Never ahead, ever behind, yet flying swiftly past, for a child, I last forever, for adults, I'm gone too fast.
I am the only vegetable or fruit that is never sold frozen canned processed or in any other form but fresh.
So simple, that I can only point. Yet I guide men all over the world.
I flow from the Homerβs mouth when he sees doughnuts.