Frequency - Word Form
 17 object
  1 objective
  6 objects
  1 obliterated
  1 obscured
  2 observed
  1 obstacles
  1 obtain
  1 obvious
  5 occur
  1 occurred
  2 occurrences
  5 occurs
  3 odours
137 of
  1 off
  6 often
  1 oil
  1 oint
  1 old
  1 older
 15 on
  1 once
 25 one
 15 only
  1 onwards
  2 open
  3 operates
  1 operation
  1 operations
  8 opinion
 33 or
  2 order
  1 ordinary
 12 organ
  9 organs
  2 original
  1 originates
  1 origination
 16 other
  3 others
  2 otherwise
  8 our
  1 ourselves
  1 over
  7 owing
  2 own