rigor (n.)
- absoluteness
- abstinence
- abstruseness
- accuracy
- acerbity
- acidity
- acridity
- acrimony
- acuteness
- adversity
- affliction
- aggravation
- algidity
- animality
- annoyance
- arduousness
- asceticism
- asperity
- astringency
- atrocity
- austerity
- barbarity
- bite
- bitterness
- bleakness
- blight
- bloodlust
- briskness
- brutality
- bummer
- burdensomeness
- care
- chill
- chilliness
- cold
- coldness
- complexity
- complication
- conscientiousness
- cool
- coolness
- correctness
- crispness
- criticality
- criticalness
- cross
- cryogenics
- curse
- delicacy
- destructiveness
- detail
- difficultness
- difficulty
- downer
- edge
- eremitism
- exactitude
- exactness
- exquisiteness
- extremity
- faithfulness
- fasting
- faultlessness
- ferociousness
- fidelity
- fierceness
- fineness
- firmness
- flagellation
- flawlessness
- force
- freshness
- frigidity
- frostiness
- fundamentalism
- furiousness
- fussiness
- gelidity
- grip
- hairiness
- hardness
- hardship
- harshness
- iciness
- impetuosity
- inclemency
- inexorability
- inflexibility
- inhospitableness
- inhumanity
- intensity
- intricacy
- irritation
- keenness
- laboriousness
- literalism
- literalness
- maceration
- malignity
- mercilessness
- meticulousness
- mindlessness
- minuteness
- monasticism
- mordacity
- mortification
- murderousness
- niceness
- nicety
- nip
- obduracy
- obstinacy
- onerousness
- oppressiveness
- orthodoxy
- particularity
- perfection
- pitilessness
- plight
- poignancy
- point
- preciseness
- precision
- predicament
- pressure
- punctilio
- punctiliousness
- punctuality
- purism
- puritanism
- rawness
- refinement
- relentlessness
- right
- rightness
- rigidity
- rigidness
- rigorousness
- roughness
- ruggedness
- savagery
- scrupulousness
- self-denial
- self-mortification
- severity
- sharpness
- sternness
- stiffness
- sting
- strenuousness
- stress
- strictness
- stridency
- stringency
- stubbornness
- subtlety
- tartness
- tautness
- teeth
- tenseness
- tension
- tensity
- terrorism
- textualism
- tightness
- toilsomeness
- toughness
- trenchancy
- trial
- tribulation
- trouble
- troublesomeness
- unyieldingness
- vandalism
- vehemence
- venom
- viciousness
- vicissitude
- violence
- virulence
- visitation
