solidify — to make solid; make into a hard or compact mass; change from a liquid or gaseous to a solid form.
appear — If you say that something appears to be the way you describe it, you are reporting what you believe or what you have been told, though you cannot be sure it is true.
arrive — When a person or vehicle arrives at a place, they come to it at the end of a journey.
collect — If you collect a number of things, you bring them together from several places or from several people.
gather — to bring together into one group, collection, or place: to gather firewood; to gather the troops.