as·per^[1]

Synonyms for asper

• acer – bitter, eager, fierce, keen, severe, sharp, stinging, violent
• atrox – cruel, harsh, horrible, terrible
• barbarus – barbarian, foreigner, rough, rude, savage, uncouth
• crudus – bleeding, fresh, green, harsh, immature, raw, uncooked, undigested, unprepared food, unripe, untimely
• districtus – busy, hesitating, severe, strict
• durus – enduring, hard, harsh, rough, rude, strong, tough, uncouth
• efferus – fierce, savage, undomesticated, untamed, wild
• ferus – fierce, savage, untamed, wild
• fragosus – broken, crashing, roaring, rough
• gravis – burdensome, grievous, heavy, important, serious, severe, unwholesome, weighty