Another term for a person who originates a lawsuit or action.
Merriam-Webster Online Dictionary
plaintiff (noun)a person who brings a legal action - compare defendant
Merriam-Webster Online Thesaurus
plaintiff (noun)the person in a legal proceeding who makes a charge of wrongdoing against another
SYNONYMS:
plaintiff, suerRELATED WORDS:
accuser; litigant, party, suitor; appellant, petitioner, pleaderNEAR ANTONYMS:
accused