两者词性和意义都不同。hate是动词/名词,awful是形容词/副词。
hate动词的意思是憎恨名词是所憎恶的人(或事物) 
例如:I hate working in the early morning.我讨厌大清早就工作。
awful是形容词/副词,意思是可怕的令人讨厌的非常地
例子,I thought he was awful.我觉得他令人讨厌。(awful是形容词)
That's an awful colour. 那颜色真难看。(awful是形容词)
He is awful smart. 他非常聪明(awful是副词)