(n): a person who pleads for a cause or propounds an idea
(n): someone who is an active supporter and advocate
(n): someone whose business is advertising
(n): a thief who steals goods that are in a store
(n): a criminal who takes property belonging to someone else with the intention of keeping it or selling it
(n): an amplifier for restoring the strength of a transmitted signal
(n): electronic equipment that increases strength of signals passing through it
(n): the first stage of a multistage rocket
(n): a jet engine containing its own propellant and driven by reaction propulsion
(n): an additional dose that makes sure the first dose was effective
(n): a measured portion of medicine taken at any one time
