What is the synonym of hateful?

There are many synonyms for "hateful", depending on the specific nuance you want to convey. Here are some options, ranging from mild to strong:

Mild:

* Disgusting

* Repulsive

* Abhorrent

* Loathsome

* Detestable

* Offensive

* Unpleasant

Moderate:

* Despicable

* Vile

* Contemptible

* Reprehensible

* Execrable

Strong:

* Malicious

* Spiteful

* Vindictive

* Cruel

* Wicked

* Diabolical

* Heinous

Other:

* Odious

* Abominable

* Invidious

* Unforgivable

* Deplorable

The best synonym to use will depend on the specific context and the strength of the feeling you want to convey.