Definitions of sham:

• noun:   something that is a counterfeit; not what it seems to be
• noun:   a person who makes deceitful pretenses
• verb:   make believe with the intent to deceive

  Example: "He shammed a headache"

• verb:   make a pretence of
• adjective:   adopted in order to deceive

  Example: "Sham modesty"

• name:  A surname (very rare: popularity rank in the U.S.: #32860)