1. Synonyms for Arduousness include difficulty, laboriousness, onerousness, operoseness, rigorousness, strenuousness, arduity, toughness, painfulness and hardness

2. Harshness of manner Synonyms: sharpness; something hard to endure Synonyms: grimness, hardship, rigor, rigorousness, rigour, rigourousness, severeness, severity Example - the Asperity of northern winters

3. Asperity: 1 n harshness of manner Synonyms: sharpness Antonyms: bluntness , dullness without sharpness or clearness of edge or point Type of: ill nature a disagreeable, irritable, or malevolent disposition n something hard to endure “the Asperity of northern winters” Synonyms: grimness , hardship , rigor , rigorousness , rigour , rigourousness