language request for help for north american english speakers: a friend has an assignment to design fathers day cards. She made some with the term "home dad" but I said to her that people use "stay at home dad", but she says it's too long. then i found that "house dad" is at least in the oxford english dictionary.. can anyone help me and tell me if "home dad" could work after all? or "house dad"? or does it sound wrong?