Following are all the stiffest like words, in the list below.
TOUGHEST
100% like stiffest
HARSHEST
100% like stiffest
FIERCEST
99.99% like stiffest
STRONGEST
99.99% like stiffest
STERNER
99.98% like stiffest
SEVEREST
99.98% like stiffest
HEAVIEST
99.98% like stiffest
LIGHTEST
99.97% like stiffest
MEANEST
99.97% like stiffest
STRICTEST
99.96% like stiffest
SOFTEST
99.96% like stiffest
FORMIDABLE
99.96% like stiffest
ROUGHEST
99.95% like stiffest
LENGTHIEST
99.95% like stiffest
BIGGEST
99.94% like stiffest
GREATEST
99.94% like stiffest
BROADEST
99.94% like stiffest
LOUDEST
99.93% like stiffest
NASTIEST
99.93% like stiffest
TOUGHENED
99.92% like stiffest
TIGHTEST
99.92% like stiffest
DEEPEST
99.92% like stiffest
MAXIMUM
99.91% like stiffest
SHARPEST
99.91% like stiffest
MILDEST
99.9% like stiffest
CLEAREST
99.9% like stiffest
STURDIEST
99.9% like stiffest
WEIGHTIEST
99.89% like stiffest
LONGEST
99.89% like stiffest
NOISIEST
99.88% like stiffest
GENTLEST
99.88% like stiffest
FEARSOME
99.88% like stiffest
GRAVEST
99.87% like stiffest
WORST
99.87% like stiffest
SHORTEST
99.86% like stiffest
SMOOTHEST
99.86% like stiffest
BITTEREST
99.86% like stiffest
HARDEST
99.85% like stiffest
STARKEST
99.85% like stiffest
TRICKIEST
99.84% like stiffest
TRUEST
99.84% like stiffest
CLEANEST
99.84% like stiffest
DARKEST
99.83% like stiffest
HEARTIEST
99.83% like stiffest
QUIETEST
99.82% like stiffest
BOLDEST
99.82% like stiffest
BRAVEST
99.82% like stiffest
STRAIGHTEST
99.81% like stiffest
STEEPER
99.81% like stiffest
BLUNTEST
99.8% like stiffest
HUGEST
99.8% like stiffest
MUDDIEST
99.8% like stiffest
SCARIEST
99.79% like stiffest
GUTSIEST
99.79% like stiffest
SWEETEST
99.78% like stiffest
GRIMMEST
99.78% like stiffest
SPEEDIEST
99.78% like stiffest
STINGIEST
99.77% like stiffest
ABLEST
99.77% like stiffest
DAUNTING
99.76% like stiffest
HIGHEST
99.76% like stiffest
FEWEST
99.76% like stiffest
STRANGEST
99.75% like stiffest
FURTHEST
99.75% like stiffest
MEEKEST
99.75% like stiffest
CREAMIEST
99.74% like stiffest
STEADIEST
99.74% like stiffest
WIDEST
99.73% like stiffest
ROCKIEST
99.73% like stiffest
FRESHEST
99.73% like stiffest
WEAKEST
99.72% like stiffest
STOUT
99.72% like stiffest
CRAZIEST
99.71% like stiffest
CRAFTIEST
99.71% like stiffest
BLOODIEST
99.71% like stiffest
BLACKEST
99.7% like stiffest
BUMPIEST
99.7% like stiffest
EARLIEST
99.69% like stiffest
SWIFTEST
99.69% like stiffest
TASTIEST
99.69% like stiffest
CLASSIEST
99.68% like stiffest
CHALLENGING
99.68% like stiffest
RAWEST
99.67% like stiffest
FINEST
99.67% like stiffest
SCRAPPIEST
99.67% like stiffest
NICEST
99.66% like stiffest
GRANDEST
99.66% like stiffest
SMALLEST
99.65% like stiffest
POTENT
99.65% like stiffest
FORCEFUL
99.65% like stiffest
PLAINEST
99.64% like stiffest
PUREST
99.64% like stiffest
DAFTEST
99.63% like stiffest
DEADLIEST
99.63% like stiffest
BEST
99.63% like stiffest
FEROCIOUS
99.62% like stiffest
LEANEST
99.62% like stiffest
CLOSEST
99.61% like stiffest
GRUELING
99.61% like stiffest
FUNNIEST
99.61% like stiffest