Contamination rhymes with:
decontamination, decontamination, decontamination, decontamination, decontamination, examination, reexamination, abomination, antidiscrimination, culmination, decontamination, denomination, determination, discrimination, dissemination, domination, elimination, emanation, examination, extermination, germination, illumination, incrimination, insemination, nomination, reexamination, renomination, self-determination, termination, transillumination
Contamination sounds like:
condemnation, contention, continuation