What law covers verbal abuse from an employer?

If you are being subjected to discrimination in employment on the basis of race, gender, national origin, religion, color, or the like, you are protected by state and federal laws. The idea is that your treatment by your employer must be so severe as to change the conditions of employment depending upon your race, or your gender, or the like. But if you are being subjected to garden-variety name calling and rude and obnoxious employer behavior, that's not usually something the law gets involved with. Generally under such circumstances your remedy is to pound the pavement and find yourself an employer who's not a jerk. Not legal advice as I don't hold Ohio licensure. It's just discussion of general principles of law which may apply to the facts you describe. If you need legal advice, please consult a lawyer who practices in Ohio.