i am sorry, but massacre ( http://dictionary.reference.com/search?q=massacre ) and pacifier ( http://dictionary.reference.com/search?q=pacifier ) dont rhyme, whatever verbal contorsion you put on it. period.

there is a difference between wordplay ( http://dictionary.reference.com/search?q=wordplay ) and completely fucking up the english language.

Examples:
massacre rhymes with capacitor
pacifier rhymes with fire