symposium – n. a formal meeting at which experts discuss a particular topic
endocrinology – n. a branch of medicine concerned with the structure, function and disorders of the endocrine glands
devastate – v. to destroy much or most of (something) : to cause great damage or harm to (something) ; devastating is the adjective.
under one umbrella – idiomatic expression to be in one place
appetite – n. a physical desire for food
habit – n. a usual way of behaving; something that a person does often in a regular and repeated way
intervene – v. to become involved in something (such as a conflict) in order to have an influence on what happens intervention is the noun