Synonyms of the word

initiator

• n. One who initiates.
• n. (chemistry) A substance that initiates a chain reaction or polymerization.
• n. (computing) A task (in a mainframe computer) that initiates multiple jobs.
• n. (medicine) A material whose presence in the body eventually leads to cancer.

instigator

• n. A person who intentionally instigates, incites, or starts something, especially one that creates trouble.

leader

• n. Any person that leads or directs.
• n. An animal that leads.
• n. Something that leads or conducts.