verb (v)

• be behind; approve of(verb.social)

  Synonym:
  back, endorse, plump for, plunk for, support
  

  source: wordnet30
• give support or one's approval to(verb.social)

  Synonym:
  back, endorse, second
  

  source: wordnet30
• guarantee as meeting a certain standard(verb.social)

  Synonym:
  certify, endorse
  

  source: wordnet30
• sign as evidence of legal transfer(verb.communication)

  Synonym:
  endorse
  

  source: wordnet30
• To cover the back of; to load or burden.(verb)

  source: webster1913