And in an "homogeneous solution", all its components are in the same phase. Consider sugar/salt in water, or dinitrogen or dioxygen in the air we breathe. Both are examples of solutions........
On the other hand, "a suspension" is "inhomogeneous". Typically this is a slurry of finely divided solid in water or some other solvent, from which the solid has precipitated.
On the other, other hand, a "colloid" is an inhomogeneous mixture of solid and solvent, a disperse phase, in which the particle size of the solid is such that it does not tend to settle. Typical colloids, say milk, have particle sizes from 1*nm-1*mum.........
