a group (of people, nations etc) as a whole

composite

overcrowded

blocked, clogged

a number of things or parts together in a mass or ball (e.g. rock)

composite

having a large group of people

busy, congested

(of liquids, vapour) not easily seen through

compressed, thick

a larger amount of; a large number of; to a large extent

additional, greater

not in the form of a liquid or gas; without holes or spaces; of strong material or construction; able to support weight etc

hard, dimensional