有哪些发音gh的单词?

Laugh, Enough, Cough三个单词里gh都发[f],其他的单词还有以下供你参考：
Tough[tʌf]坚韧的
Haugh[hɔ:,hɑ:f]泛滥平原
Rough[rʌf]粗鲁的
Clough[klʌf]深谷
Slough[slʌf]难以改变的不良心理
Trough[trɔ(:)f]饲料槽
Bellylaugh[ˈbeliˌlɑ:f]捧腹大笑

ugh, high, aargh, bough, heigh, rough, thigh, tough, weigh, aarrgh, though, through, unrough, although, outlaugh, outweigh, overhigh, preweigh, semihigh, thorough, overweigh, ultrahigh, horselaugh, overslaugh, breakthrough.