Formal:
* Tatay: This is the most common and formal word for "father" in Filipino.
* Ama: This is a more literary or poetic word for "father."
Informal:
* Papa: This is a more casual and affectionate term for "daddy."
* Tay: This is a very casual and informal term for "father" or "daddy," often used by children.
Note: It's important to be aware of the context and relationship when using these terms. "Tatay" is the most respectful way to address someone's father, while "Papa" or "Tay" are more appropriate for informal settings or when addressing your own father.