Understandable names of the radicals
厂, this radical has few frequently used characters and you might not find any good name of it in practice. 偏廈 is probably the best one. I call it 厓字頭 because it is the radical of 厓 (cliff, which has derivatives of 崖 and 涯).

I now go a little deeper on this radical.

This radical is actually a character of its own. Inherently it read hɔn in Cantonese and han in Mandarin. In the evolution of characters, it turns into 厈 and 岸. It originates from stone and rock, and extends to the rocky side of hills. Most of characters under 厂 radical follow the meaning of 厂, like 厚, 原, 厲. These are some other readings of 厂. You can look them up in some great dictionaries.

As you notice, 广 and 厂 is so similar and some characters under 广 mistakenly goes into 厂, for example, 廈, 廠, 廁, 廚. 广 is some simple house and you can imagine a wall on the left side and A-shaped root. Those characters in this radicals follows the meaning of house, say 廈, 廠, 廁, 廚, 府, 庫, 廊, 廬, 廟.  广 has its reading too. It is jim in Cantonese and yan in Mandarin. I call it 廣字頭 as it is the radical of 廣.

It is possible to make of some commonly known characters under a radical, like 厓字頭, 廣字頭. For characters under 艸, it is named 草花頭. They all just mean the "head" or "top" of one or two particular characters.

A little bit more. The simplification of 廣 to 广 and 廠 to 厂 causes too much confusion in the understanding of Chinese characters. It is not only the confusion with meaning described above. 黃 and 敞 indicates the pronunciation of 廣 and 廠, and now they are eradicated in simplified characters.