Formal:
* அம்மா (amma) - This is the most common and formal way to say "mother" in Tamil. It's used for addressing one's own mother or referring to someone else's mother.
* தாயார் (thayar) - This is another formal term for "mother," often used in more literary or religious contexts.
Informal:
* அம்மா (amma) - This is also used informally, but often with a more affectionate tone.
* மாமா (mama) - This is a more familiar term for "mummy," usually used by children.
* அம்மு (ammu) - This is a very affectionate and endearing term used mainly by young children.
Other options:
* நீங்க (neenga) - This means "you" and can be used to address one's mother, especially if the speaker is an adult.
* அம்மை (ammai) - This is a slightly less common term for "mother."
Note: The best way to choose the right term is to consider your relationship with the person and the context of the conversation.