Habituation
Part of speech: noun
Definition: The act of habituating, or accustoming; the state of being habituated.
Addiction
Part of speech: noun
Definition: The state of being addicted; devotion; inclination.A habit or practice that damages, jeopardizes or shortens one's life but when ceased causes trauma.A pathological relationship to mood altering experience that has life damaging consequences.
Example sentence: If you don't know someone who's had a problem with addiction, you will.