adverb (r)

• out of proportion(adv.all)

  Example:
  This wall is disproportionately long.
  

  Synonym:
  disproportional, disproportionate
  Antonym:
  proportionately
  

  source: wordnet30
• to a disproportionate degree(adv.all)

  Example:
  His benefits were disproportionately generous.
  

  Antonym:
  proportionally, proportionately
  

  source: wordnet30