Cases of word usage

1) unexpected and sudden (abrupt)

2) a sudden or unexpected (especially unpleasant) meeting (encounter)

3) (of a person, behaviours) likely to do unusual or unexpected things (erratic)

4) unusual and unexpected (freak)

5) kinds of food, items etc that give pleasure, are unexpected etc (goodies)

6) (in the Bible) food provided by God; something unexpected that gives hope, determination etc (manna)

7) unexpected danger or difficulty (especially one that is not easy to identify) (pitfall)

8) strengthening; giving rest and comfort; pleasing and interesting because rare or unexpected (refreshing)

9) a hidden, unknown or unexpected difficulty (snag)

10) done, happening, without warning; (the feeling caused by) something sudden or unexpected (surprise)