Downward movement Upward movement
Verb Noun Verb Noun
 To cut (T)  A cut  To balloon (IT)  A ballooning
 To decline (IT)  A decline  To expand (IT/T)  An expansion
 To decrease (T/IT)  A decrease  To increase (IT/T)  An increase
 To dive (IT)  A dive  To peak (IT)  A peak
 To drop (IT)  A drop    
 To fall (IT)  A fall    
 To plummet (IT)  A plummet    
 To plunge (IT)  A plunge