What is synonymous with the phrase are so

There isn't one single perfect synonym for "are so," as the phrase can have different meanings depending on the context. Here are some options depending on the intended meaning:

For emphasis:

* are very

* are extremely

* are incredibly

* are really

* are truly

For casualness:

* are just

* are totally

* are simply

* are absolutely

For sarcasm:

* are such

* are quite

* are rather

For expressing agreement:

* are indeed

* are definitely

* are certainly

For showing a strong emotion:

* are so [emotion] (e.g., are so happy, are so sad)

Ultimately, the best synonym for "are so" depends on the specific context and the intended meaning.