Question

similarities between suspension and collids

Answer 1

Both are liquids. Both will pass through filters without seperation. You can see through a solution, as the ions of the solute are dissolved. A colloid is a suspension of insoluble ultra micriscopic particles or large molecules in water or other liquid, kept in suspension by Brownian motion.

Answer 2

They are both heterogeneous mixtures. 
(That means they have at least two distinguishable parts, like a chocolate chip cookie. The two parts are call the dispersed phase (analogous to the solute) and the continuous phase (analogous to the solvent)) 
They both scatter light. (On a clear day you don't see rays of sunlight, but if the air is a little foggy or misty, or dusty, the light is scattered off those particles and you see rays of sunlight. It's called the Tyndall Effect.)

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