What can you use instead of thanks?

Here are some alternatives to "thanks," depending on the context and level of formality:

Formal:

* Thank you (more formal than "thanks")

* I appreciate it

* I'm grateful

* I'm obliged

* Many thanks

Informal:

* Cheers

* Thanks a bunch

* Thanks a million

* Much obliged

* You're a lifesaver

* I owe you one

* Appreciate it

* No problem (if someone is thanking you)

More specific:

* I'm so grateful for your help.

* Your kindness means a lot to me.

* I really appreciate your time.

* This is really helpful.

You can also use a gesture like a nod or a smile to acknowledge someone's help or kindness, especially in informal situations.