Question

can we say plane mirror spherical mirror

Answer 1

No we can't because
A plane is a flat surface. ... And a concave mirror is a spherical mirror where the mirroredsurface is on the inside of thespherical curve. Plane mirrorsproduce virtual, upright images that are the same size as the object. Virtual, by the way, just means the image is formed behind the mirror instead of in front of it.
I hope it will help you..

Answer 2

no plane mirror cannot be called as spherical mirror