constitute:to be the parts or people that form sth.指组成,构成
例:People under the age of 40 constitute the majority of labour force.
construct:to build sth such as a road,building or machine 修建,建造
establish= set up 建立,创立,设立
found：可以指建立,创立（=establish） 也可以指兴建（城市或国家）