Mother is the formal term for Mum
myopia
thereupon
amendment
Blacking out (less formal) or losing consciousness (more formal).
Current events
An argumentum is a formal term for an argument.
tier
The formal term for body language is nonverbal communication. It includes gestures, facial expressions, body movements, and posture that convey messages without using words.
symmetrical.
The formal term for foot fetish "podophilia"
guts is a widely used term refering to the internal organs of an animal... sharks do have organs just like us humans. Very different organs but organs, so the answer would be yes.