party favor vs reward

party favor

• A small gift given to a guest at a party, as a souvenir. 

• A narcotic, particularly an amphetamine, to be shared at a gathering. 

reward

• A prize promised for a certain deed or catch 

• Something of value given in return for an act. 

• The result of an action, whether good or bad. 

• To give a reward to or for. 

• To recompense.