strengthened (adj.)

• accelerated
• augmented
• backed
• beefed-up
• callous
• calloused
• case-hardened
• crusted
• crusty
• crystallized
• elevated
• enhanced
• enlarged
• expanded
• extended
• fossilized
• granulated
• hardened
• increased
• indurate
• inflated
• intensified
• magnified
• multiplied
• ossified
• raised
• reinforced
• sclerotic
• set
• solidified
• spread
• swollen
• toughened
• vitrified