Liguria i was also try to answer this question and my Italian tutor helped me
A rainbow is actually round. On the ground, the bottom part is hidden. In the sky, like from the view of a flying airplane, it can be seen as a round shape. Check the Popsci link for more information.
An arch or lintel supported by corbels, or protrusions from a wall.
it is shaped like a whale
The world is shaped like a sphere.
An arch in gymnastics is where you bend your back slightly so that you are shaped like "(" that.
folded mountain
a rainbow is not shaped like a arc its a circle
Marsh Concrete Rainbow Arch Bridge was created in 1911.
syncline
syncline
rainbow
rainbow
Can be a noun. For example, the rainbow is shaped like an arc.
A solar flare arches up from the surface of the sun.
there are not very many you go up to then top in an elevator that is shaped like a pod
Violet