ruggedness

nouns

the property of being big and strong
huskiness, ruggedness, toughness
is derived from
rugged
the quality of being topologically uneven
"the ruggedness of the mountains"
ruggedness
is derived from
rugged
is a type of (narrower)
the quality of being uneven and lacking uniformity
unevenness, variability
the quality of being difficult to do
"he assigned a series of problems of increasing hardness"; "the ruggedness of his exams caused half the class to fail"
hardness, ruggedness
is derived from
rugged