Is there a single word or short phrase to describe someone who treats women like objects?
Is there a similar word/phrase for who objectifies other people in general?


Solution 1:

some thoughts:
misogynist
(male) chauvinist
sexist

None really encompasses the objectification of women, but they all kind of get at the idea.

Solution 2:

Objectifier fits your second question. Add "of women" if that's short enough to answer the first.

I've heard womanizer used that way as well, although it's not exactly the same as the formal definition.