1) French word used in English 2) Litigant 3) Litigator 4) Plaintiff 1) Plaintiff 2) Suer 
The party who complains or sues; one who applies to the court for legal redress. Also called the plaintiff.
• (n.) One who makes complaint. • (n.) One who commences a legal process by a complaint. • (n.) The party suing in equity, answering to the plaintiff at common law.
A customer who calls or writes in about a problem or discrepancy.
Someone who lodges a complaint. See Claimant.
A person who intiates a legal proceeding by filing a case against someone who commits a crime.He is also called the plaintiff or petitioner.
Com·plain'ant noun [ French complaignant , present participle of complaindre .] 1. One who makes complaint. « Eager complainants of the dispute. Collier. » 2. (Law) (a) One who commences a legal process by a complaint. (b)...
A person or entity that begins a lawsuit by filing a complaint. Usually called the plaintiff or petitioner.
See plaintiff.
the person who has made an allegation against Church personnel.
A person who makes a complaint
a person, group, or company that makes a complaint, as in a legal action.