Definitions:

1. Physical toughness or durability. NOUN
   • The truck's ruggedness makes it ideal for off-road driving.
2. Rough or uneven terrain or landscape. NOUN
   • The ruggedness of the mountains made them difficult to climb.
3. Strong, resilient character or apperance. NOUN
   • His ruggedness appealed to audiences as the classic action hero.

Synonyms:

• coarseness
• durability
• hardness
• irregularity
• masculinity
• resilience
• toughness