father vs paternal

father is a noun but paternal is not a noun.

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

father (noun)	paternal (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

father (adjective)	paternal (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

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