Assertion list for term "vary in difficulty".

Results from Ascent++: 6
hike CapableOfvary in difficulty 0.49
repair CapableOfvary in difficulty 0.48
puzzle CapableOfvary in difficulty 0.43
obstacle CapableOfvary in difficulty 0.42
walk CapableOfvary in difficulty 0.40
trek CapableOfvary in difficulty 0.25