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