Foster-father and Foster parent

Foster-father noun - A man who is a foster parent.

Foster parent and foster-father are semantically related. In some cases you can use "Foster parent" instead a noun phrase "Foster-father".

Foster parent noun - A person who acts as parent and guardian for a child in place of the child's natural parents but without legally adopting the child.

Foster-father and foster parent are semantically related. Sometimes you can replace phrase "Foster-father" with "Foster parent", this phrases are similar.