One who antagonizes or stirs.
An opponent or enemy.
A muscle that acts in opposition to another.
A chemical that binds to a receptor but does not produce a physiological response, blocking the action of agonist chemicals.
The main character or force opposing the protagonist in a literary work or drama.
A person with whom one is vaguely or indirectly acquainted.
A lover; a boyfriend or girlfriend.
Used as a form of address when warning someone.
A spring-loaded camming device.
A person who backs or supports something.
A person, typically someone other than a family member, spouse or lover, whose company one enjoys and towards whom one feels affection.
Used to refer collectively to a group of associated individuals, especially those comprising a cast, company, or crew
A function or class granted special access to the private and protected members of another class.
An associate who provides assistance.
An object or idea that can be used for good.
To add (a person) to a list of friends on a social networking site; to officially designate (someone) as a friend.