- cruel
- harsh
- horrible
- terrible
Synonyms for atrox
- asper – fierce, harsh, rough, severe, violent
- crudelis – cruel
- crudus – bleeding, fresh, green, harsh, immature, raw, uncooked, undigested, unprepared food, unripe, untimely
- durus – enduring, hard, harsh, rough, rude, strong, tough, uncouth
- ferreus – cruel, hard, made of iron, unbending, unfeeliing
- horrendus – dreadful, horrible
- inhumanus – barbarous, cruel, inhuman, savage, uncivil, uncivilized
- severus – harsh, stern