Partisan is a term used to describe someone who is strongly committed to a particular political party or cause. A PARTIAL (7 letters) is someone who is only partially committed, an UPHOLDER (8 letters) is someone who actively defends a cause, a BACKER (6 letters) is someone who provides financial or moral support, a SUPPORTER (9 letters) is someone who actively promotes a cause, an ADHERENT (8 letters) is someone who follows a particular set of beliefs, a ZEALOT (6 letters) is someone who is fanatically devoted to a cause, JAUNDICED (9 letters) is someone who has a negative view of something, factional (9 letters) is someone who is devoted to a particular faction, UNJUST (6 letters) is someone who is not fair or impartial, BIGOTED (7 letters) is someone who is PREJUDICED and intolerant, PREJUDICED (10 letters) is someone who has an unfair opinion of something, INTERESTED (10 letters) is someone who is involved in a particular activity, SECTARIAN (9 letters) is someone who is devoted to a particular sect, HELPER (6 letters) is someone who provides assistance, ADVOCATE (8 letters) is someone who speaks in favor of something, DISCIPLE (8 letters) is someone who follows the teachings of a particular leader, ALLY (4 letters) is someone who is united with another person or group, BIASED (6 letters) is someone who is influenced by personal feelings, a FAN (3 letters) is someone who is enthusiastic about something, and a sider (5 letters) is someone who takes sides in a dispute.