Struggle or Suffer?

Suffer or struggle?  Two words similar in length each containing four common letters and a double consonant.  They may appear to be interchangeable.  However, when facing challenges, the word we use speaks volumes.  One person describes suffering from a condition.  Another shares that he struggles with it.  Suffering is the victim's word of choice.  One who tolerates the situation.  Allows the power to reside elsewhere.  Struggle implies exerting great effort trying to achieve positive results.  A person of strength.  So much expressed in just one word.