What's your question? they are both words.
Edit:
Which one are you looking for?
Main Entry: her·e·sy
Pronunciation: \'her-?-se, 'he-r?-\
Function: noun
Inflected Form(s): plural -sies
Etymology: Middle English heresie, from Anglo-French, from Late Latin haeresis, from Late Greek hairesis, from Greek, action of taking, choice, sect, from hairein to take
Date: 13th century
1 a: adherence to a religious opinion contrary to church dogma b: denial of a revealed truth by a baptized member of the Roman Catholic Church c: an opinion or doctrine contrary to church dogma
2 a: dissent or deviation from a dominant theory, opinion, or practice b: an opinion, doctrine, or practice contrary to the truth or to generally accepted beliefs or standards
Main Entry: hear·say
Pronunciation: 'hir-"sA
Function: noun
1 : RUMOR
2 : HEARSAY EVIDENCE