The 16 words below may be separated into 4 groups.
Additionally, there is a word absent from the wall which can be placed in all four of those groups.
Can you identify the four groups?
What new word can be placed in all four of those groups?
One of the categories is stuck in 2011, with an actor who would peak in a later year by singing with a Stone
One of the categories can be of noble descent, the head of its members can be replaced with more noble ones
One of the categories doesn't start soft, the members would love some extra strength to help them
One of the categories goes further than needed, but maybe too much
All previous hints now have additional bold text