Demandant is a legal term used to refer to a person who demands something. Synonyms for demandant include claimant, petitioner, suitor, plaintiff, appellant, applicant, pursuer, and suer. A claimant is a person who makes a claim or demand for something, while a petitioner is someone who petitions or requests something from an authority. A suitor is someone who seeks the hand of another in marriage, but it can also be used to describe someone who seeks something from another. A plaintiff is a person who initiates a legal action, while an appellant is someone who appeals a decision made by a court. An applicant is someone who applies for something, while a pursuer and suer are both terms used to describe someone who is pursuing legal action.