stiffened (?.)

• accelerated
• aggrandized
• amplified
• augmented
• backed
• beefed-up
• bloated
• boosted
• broadened
• calcified
• callous
• calloused
• case-hardened
• crusted
• crusty
• crystallized
• deepened
• elevated
• enhanced
• enlarged
• expanded
• extended
• fossilized
• granulated
• hardened
• heightened
• hiked
• hornified
• increased
• incrusted
• indurate
• indurated
• inflated
• intensified
• jazzed up
• lapidified
• magnified
• multiplied
• ossified
• petrified
• proliferated
• raised
• reinforced
• rigidified
• sclerotic
• set
• solidified
• spread
• steeled
• strengthened
• swollen
• tightened
• toughened
• vitrified
• widened