1. Detrimental: causing harm, damage, or injury.
2. Injurious: causing or likely to cause harm or damage.
3. Deleterious: harmful or injurious to health or well-being.
4. Pernicious: having a harmful or destructive effect, especially in a gradual or insidious manner.
5. Noxious: harmful to health or well-being, especially through being poisonous, toxic, or unpleasant.
6. Destructive: causing or tending to cause damage or ruin.
7. Ruinous: causing or leading to ruin, destruction, or downfall.
8. Detrimental: causing harm or damage, especially in a significant or lasting way.
9. Adverse: unfavorable or harmful in effect or influence.
10. Unfavorable: not advantageous, beneficial, or convenient.
11. Prejudicial: causing or tending to cause harm, damage, or disadvantage.
12. Damaging: causing or likely to cause harm, injury, or damage.