Insemination rhymes with:
dissemination, dissemination, emanation, abomination, antidiscrimination, contamination, culmination, decontamination, denomination, determination, discrimination, dissemination, domination, elimination, emanation, examination, extermination, germination, illumination, incrimination, nomination, reexamination, renomination, self-determination, termination, transillumination
Insemination sounds like:
imagination, incantation, insinuation