Cremation rhymes with:
acclamation, acclimation, affirmation, amalgamation, animation, approximation, automation, confirmation, consummation, dalmatian, defamation, deformation, disinformation, estimation, exclamation, exhumation, formation, inflammation, information, intimation, malformation, misinformation, proclamation, reaffirmation, reclamation, reconfirmation, reformation, sarmatian, summation, transformation, unimation
Cremation sounds like:
carnathan, carnation, cochranton, corinthian, coronation, corundum, cramton