Incantation rhymes with:
argumentation, augmentation, confrontation, disorientation, documentation, experimentation, fermentation, fragmentation, implantation, implementation, indentation, instrumentation, misrepresentation, orientation, ornamentation, ostentation, pigmentation, plantation, presentation, recantation, regimentation, representation, sedimentation, segmentation, transplantation
Incantation sounds like:
imagination, insemination, insinuation