earth-shattering 
(also earth-shaking)
adjective
(In hyperbolic use) very important, shocking, or traumatic: tell me this earth-shattering news of yours...
- The question does not have to be of earth-shattering importance, but it really does have to be of deep concern to the querist at the time the question is asked.
- I know this isn't exactly earth-shattering news but the news does bring back quite a flood of happy memories for me.
- It may not sound like earth-shattering news, but for those of us who love our cinemas as much as we do our movies, it is.
Derivatives
earth-shatteringly
- And when last did any leader do something so earth-shatteringly positive for the people of this country that they would sit up and take notice?
- While being nothing earth-shatteringly different, the formula has worked for them because they do what they do earnestly and well.
- Are our politicians so earth-shatteringly dull and similar that it doesn't matter who is elected?
- feel free (to do something)
- feel-good
- feel-good factor
- feel-goodism
- feelie
- feeling
- feelingful
- feelingless
- feelingly
- feelingness
- feel like (doing) something
- feel one's age
- feel one's oats
- feel one's way
- feel (or find) one's legs
- feel (or look) small
- feel (or take) the pulse of
- feel small
- feel the draught
- feel the pinch
- feel the pulse of
- feelthy
- feely
- fee-paying
- fee simple