hardening (n.)
- acclimation
- acclimatization
- accommodation
- adaption
- adjustment
- agglutination
- arteriosclerosis
- atherosclerosis
- breaking
- calcification
- changelessness
- clumping
- clustering
- compression
- concentration
- concretion
- condensation
- conditioning
- consolidation
- constancy
- crystallization
- densification
- domestication
- durability
- duration
- endurance
- familiarization
- firmness
- fixedness
- fortification
- fossilization
- granulation
- habituation
- housebreaking
- immobility
- immovability
- immovableness
- immutability
- induration
- invariability
- invariableness
- invigoration
- lastingness
- naturalization
- orientation
- ossification
- permanence
- permanency
- persistence
- persistency
- petrifaction
- petrification
- quiescence
- refreshment
- reinforcement
- revivification
- rigidity
- sclerosis
- seasoning
- setting
- solidification
- solidity
- stability
- standing
- stasis
- steadfastness
- stiffening
- strengthening
- tempering
- torpor
- training
- unchangeability
- unchangingness
- vitrification
