paternal vs father

paternal is not a noun while father is a noun.

Word	Noun	Adjective	Verb	Adverb
paternal	No	Yes	No	No
father	Yes	No	Yes	No

paternal (noun)	father (noun)
	a male parent (also used as a term of address to your father)
	the founder of a family
	a person who holds an important or distinguished position in some organization
	a person who founds or establishes some institution
	the head of an organized crime family

paternal (adjective)	father (adjective)
characteristic of a father
relating to or characteristic of or befitting a parent
belonging to or inherited from one's father
related on the father's side

paternal (verb)	father (verb)
	make (offspring) by reproduction