Sabbatarian (?.)
- 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
