兩者詞性和意義都不同。hate是動詞/名詞,awful是形容詞/副詞。
hate動詞的意思是憎恨名詞是所憎惡的人(或事物) 
例如:I hate working in the early morning.我討厭大清早就工作。
awful是形容詞/副詞,意思是可怕的令人討厭的非常地
例子,I thought he was awful.我覺得他令人討厭。(awful是形容詞)
That's an awful colour. 那顏色真難看。(awful是形容詞)
He is awful smart. 他非常聰明(awful是副詞)