sectarian

[1]	sectary , sectarist
[2]	adherent , member , sectary , votary , cultist , partisan
[3]	(true) believer , dogmatist , fanatic , bigot , zealot , extremist , (Slang) nut , bug , fiend

adj.

[1]	cultist , cultish , clannish , cliquish , partisan , partial , dogmatic , doctrinaire , factional
[2]	parochial , narrow , narrow-minded , limited , insular , provincial , rigid , fanatic(al) , prejudicial , prejudiced , bigoted