Albigensian
Catharist
Franciscan
High-Churchist
Trappist
Waldensian
abstainer
abstinent
anchorite
anchoritic
ascetic
austere
bhikshu
bigoted
creedbound
dervish
dogmatic
eremitic
evangelical
fakir
flagellant
formalist
formularist
formulist
fundamentalist
hermit
hidebound
hyperorthodox
literalist
literalistic
liturgist
mendicant
precisianist
precisianistic
purist
puristic
puritan
puritanical
rigoristic
ritualist
sacramentarian
sannyasi
self-denying
staunch
straitlaced
strict
wedded to poverty
yogi
yogin
religious person