forefather vs father

forefather and father both are nouns.

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

As nouns, forefather and father are synonyms defined as:

Other synonyms of forefather include sire.

forefather (noun)	father (noun)
the founder of a family	a male parent (also used as a term of address to your father)
person from an earlier time who contributed to the tradition shared by some group	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

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