Awkward Replacements for Because

Because some of the following have other meanings or are awkward in their phrasing, you are advised to use because instead of them.

As
As can mean because, but it can also mean while, having to do with time rather than cause. When you use it to mean because, you may be being ambiguous. Use because when you mean because and use while when you mean while.

Ambiguous Nonstandard Sentence
As Rome burned, Nero fiddled.

That sentence is ambiguous. It may mean that Nero fiddled while Rome burned. But it may mean that Nero didn’t like Rome very much and that he fiddled out of joy that it was burning. If you mean the former, you should write “While Rome burned, Nero fiddled.” If you mean the latter, write “Because Rome burned, Nero fiddled.”

Being as
Being that
These are both very rough approximations of because. Why not simply use the simpler word rather than a complex and awkward phrase? “Being as communication is quite important, we should simplify when possible” could very easily be changed to “Because communication is quite important, we should simplify when possible.”