All terms in this list:

abuse: Improper treatment or usage; application to a wrong or bad purpose; misuse; perversion. [from 15th c]

addict: A person who is addicted, especially to a harmful drug

address: Direction or superscription of a letter, or the name, title, and place of residence of the person addressed.

advocate: A person who argues the case of another, such as a lawyer in a court.

affiliate: Someone or something that is affiliated, or associated; a member of a group of associated things.

aggregate: A mass, assemblage, or sum of particulars; something consisting of elements but considered as a whole.

annex: An addition, an extension.

arithmetic: The mathematics of numbers (integers, rational numbers, real numbers, or complex numbers) under the operations of addition, subtraction, multiplication, division, raising to powers and extraction of roots..

associate: A person united with another or others in an act, enterprise, or business; a partner or colleague.