As
While
Synonyms: While, even as, at the moment that, just when, just as, at the (same) time that, during the time that, and simultaneously.
Because
Synonyms: Because, seeing that, considering that, in view of the fact that, on account of, forasmuch, since, seeing as, on account of the fact that, owing to the fact that, and for.
Although
Synonyms: Although, even though/if, despite the fact that, notwithstanding that, while, albeit, though, in spite of the fact that, notwithstanding the fact that, for all that, whilst, and however.
Being
Synonyms: In the guise of, in the character of, in the role of, acting as, with the appearance of, so as to appear to be, being, and functioning as.
Example Sentences
She smiled as he approached.
As the sun set, silence followed.
He ran as fast possible.
As expected, the meeting ended.