Hostile work environment generally has a rather specific legal meaning in employment law.
Bottom line, the hostile work environment has to be related to a "protected characteristic" or in retaliation to filing a compliant based upon such a characteristic. Protected characteristics are things such as race, sex, or ethnic background. Some states also extend protection to sexual orientation.
If the verbal abuse cannot be traced to such a protected characteristic, then it is legal. Your options are either to put up with it or find another job.