Frequency - Word Form
   1 unable
   2 unambiguous
   1 unavailing
   1 unaware
   3 uncertain
   3 uncertainty
   7 under
  10 understand
   4 understanding
   1 understandings
   1 understood
   1 undertake
   3 undetected
   2 unequal
   1 unfair
   1 ungrammatical
   1 units
   2 unity
   5 universal
   3 universally
   3 universe
   9 unjust
   3 unjustly
   1 unknown
   3 unless
   2 unlike
   3 unmusical
   1 unnatural
   1 unpractised
   1 unreal
   1 unreasoned
   1 unscientific
   1 untrue
   1 unwritten
   9 up
  85 upon
  12 us
  19 use
  22 used
   3 useful
   3 uses
   3 using
   1 usual
   2 usually
   1 utter