Do-nothing and Happy-go-lucky

Do-nothing adjective - Characterized by inability or unwillingness to work toward a goal or assume responsibility.

Happy-go-lucky and do-nothing are semantically related. In some cases you can use "Happy-go-lucky" instead an adjective phrase "Do-nothing".

Happy-go-lucky adjective - Having a relaxed, casual manner.

Do-nothing and happy-go-lucky are semantically related. Sometimes you can use "Do-nothing" instead an adjective phrase "Happy-go-lucky".