Cadger noun – Someone who mooches or cadges (tries to get something free). Hanger-on and cadger are semantically related. in scrounger topic. In some cases you can use "Hanger-on" instead a noun "Cadger".
Hanger-on noun – A person who is supported by or seeks support from another without making an adequate return. Cadger and hanger-on are semantically related. You can use "Cadger" instead a noun phrase "Hanger-on".