Bird dog and Foster parent

Bird dog noun - A gun dog trained to locate or retrieve birds.

Foster parent and bird dog are semantically related. In some cases you can use "Foster parent" instead a noun phrase "Bird dog".

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.

Bird dog and foster parent are semantically related. Sometimes you can use "Bird dog" instead a noun phrase "Foster parent".