rig·or·ism 
(rĭgə-rĭz′əm)
(rĭgə-rĭz′əm)n.
Harshness or strictness in conduct, judgment, or practice.
rigor·ist n.
rig′or·istic adj.
- prayer book
- prayerful
- prayerfully
- prayerfulness
- prayer meeting
- prayer rug
- prayer shawl
- prayer wheel
- praying mantis
- praziquantel
- prazosin
- PRC
- pre-
- preach
- preacher
- preachification
- preachify
- preachily
- preachiness
- preachingly
- preachment
- preach to the choir
- preach to the choir/converted
- preach to the converted
- preachy