Four words have been given, out of which three are alike in some manner and one is different. Select the odd one.

 Let's analyzed all the options:

(a) Pyramid – A 3D shape with a polygonal base and triangular faces that meet at a point.
(b) Cylinder – A 3D shape with two circular bases and a curved surface.
(c) Cuboid – A 3D shape with six rectangular faces.
(d Circle – A 2D shape, having no volume or depth.
Pyramid, Cylinder, and Cuboid are three-dimensional (3D) shapes.
Circle  is a two-dimensional (2D) shape.
Odd One:
Circle (D) is the odd one out because it is 2D, while the others are 3D.
Thus, the correct option is (d) Circle