Do-nothing and Might-have-been

Do-nothing noun - A lazy person.

Might-have-been and do-nothing are semantically related. In some cases you can use "Might-have-been" instead a noun phrase "Do-nothing".

Might-have-been noun - An event that could have occurred but never did.

Do-nothing and might-have-been are semantically related. Sometimes you can use "Do-nothing" instead a noun phrase "Might-have-been".