In case you are interested in more than definitions of words: Bond investors do not care if you default by giving them a haircut, doing things like forcefully extending the term to 100 years or lowering the currency value by printing money.
In either case they will adjust their future risk premium of US govt. bonds and of course price in future inflation.
One might be able to hide the money printing for a while, though, while the haircut is explicit.
In case you are interested in more than definitions of words: Bond investors do not care if you default by giving them a haircut, doing things like forcefully extending the term to 100 years or lowering the currency value by printing money. In either case they will adjust their future risk premium of US govt. bonds and of course price in future inflation.
One might be able to hide the money printing for a while, though, while the haircut is explicit.