Father figure and Stepfather

Father figure noun - A man who takes over all the functions of the real father.

Stepfather and father figure are semantically related. In some cases you can replace term "Stepfather" with "Father figure", this terms are similar.

Stepfather noun - The husband of your mother by a subsequent marriage.

Father figure and stepfather are semantically related. Sometimes you can use "Father figure" instead a noun "Stepfather".