What is the synonym of also?

There are many synonyms for "also", depending on the context and the nuance you want to convey. Here are some options:

Formal:

* As well

* Too

* Furthermore

* Moreover

* In addition

* Besides

Informal:

* And

* Too

* Plus

* Likewise

* Similarly

* Equally

More specific:

* Additionally

* Consequently

* Therefore

* Hence

* Accordingly

The best synonym to use will depend on the specific situation and the desired tone.