Prerogative
Part of speech: adjective
Definition: Having a hereditary or official right or privilege.
Part of speech: noun
Definition: A hereditary or official right or privilege. A right, or power that is exclusive to a monarch etc, especially such a power to make a decision or judgement. A right, generally A property, attribute or ability which gives one a superiority or advantage over others; an inherent advantage or privilege; a talent.
Example sentence: I believe firmly that in making ethical decisions, man has the prerogative of true freedom of choice.
Perquisite
Part of speech: noun
Definition: Any monetary or other incidental benefit beyond salary.A gratuity.A privilege or possession held or claimed exclusively by a certain person, group or class.