Big differences!
Silverware: plates, bowls, knives, forks etc made of silver (or these days probably just silver in colour)
Crockery: plates, bowls, tureens. Usually made of ceramic or pottery.
Utensils: things like wooden spoons, spatulas, whisks - things with practical applications used while making, preparing and cooking food, not for eating it.
Cutlery: Knives, forks, spoons used for eating food.