amendment
Mother is the formal term for Mum
The formal term for a master's degree is a "postgraduate degree."
A declaration is a formal statement of opinion.
thereupon
myopia
Blacking out (less formal) or losing consciousness (more formal).
Current events
An argumentum is a formal term for an argument.
tier
symmetrical.
The alternative term to "dear" that can be used to address someone in a formal letter is "respected."
The formal term for foot fetish "podophilia"