father vs cofounder

father and cofounder both are nouns.

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

As nouns, cofounder is a hyponym of father; that is, cofounder is a word with a more specific, narrower meaning than father:

Other hyponyms of father include coloniser, colonizer, foundress.

father (noun)	cofounder (noun)
a male parent (also used as a term of address to your father)	one of a group of founders
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 (verb)	cofounder (verb)
make (offspring) by reproduction