"ruggedness" in the noun sense
1. huskiness, ruggedness, toughness
the property of being big and strong
2. ruggedness
the quality of being topologically uneven
"the ruggedness of the mountains"
3. hardness, ruggedness
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"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License