haha that's an interesting question, I have never thought about it before, generally I would use "脸" to refer to "face", while other words might have different meanings and their own usages, and these usages might be limited to very few cases. For example, when using "面目", we tend to focus on the impression we have after seeing one's face, like "面目清秀", "面目狰狞", besides, "面目" could also be used to imply one's hidden personality, the only usage I could think of is "露出了...的面目", which means some aspect of one's real personality becomes unveiled.

hi , in chinese we use this word 'face' to describle people looks like. we usually use -- 脸, 面, 面庞,面孔, 颜面 in oral speaking. ------> this is you said 'important' thanks.

because of ignorance and lame dictionary 顔 is short of 颜面 which means face as reputation, not body 庞 is short of 脸庞 脸 if short of 脸面 and 脸蛋 while 头脸 is a combination of 2 words in English it's "head and face" and 脸部 is "facial part" and same 脸孔, 脸子 面 isn't only face, just any surface 面目 isn't face, it's appearance 面部, 面目, 面孔, 面盘, 面庞 are all about 面 as face 薄面 is a slang word so, totally only 4, and 4 isn't "many", 4 is "few"

脸and面 are the most important words, most of the other words are used in proportions with these two. 颜 sometimes means the face, but when it does, usually goes on with 面： 你让我颜面何存。（you can olny see this expression on TV soap opera, we won't use it in daily life）when you see the word 面， you know that's about the face. 脸面: it has the word 脸 and 面，of course it means face. 我的脸面都让你丢尽了。 the others are all about the face: 他的脸部有一颗黑痣。There's a mole on his face. 她有一个漂亮的脸庞。She has a beautiful face. 他的面部有一块刀疤。There's a scar on his face 那个小女孩有个漂亮的脸蛋。The little girl has a beautiful face. 他的脸庞比较大。His face is big. 他的脸部被烫伤了，已经面目全非了。（面目全非还可以指其他的，不如说，十年之后我回到家乡，这里已经面目全非了）His face is scalded, burnt beyond recognition. 。。。