Concatenation rhymes with:
destination, detonation, intonation, predestination, procrastination, abomination, alienation, antidiscrimination, assassination, combination, contamination, coordination, coronation, culmination, decaffeination, decontamination, denomination, destination, determination, detonation, discrimination, disinclination, dissemination, divination, domination, elimination, emanation, examination, explanation, extermination, fascination, germination, hallucination, hydrogenation, hyphenation, illumination, imagination, impersonation, inclination, incoordination, incrimination, indoctrination, insemination, insubordination, intonation, machination, nomination, ordination, origination, pagination, pollination, predestination, procrastination, profanation, reexamination, rejuvenation, renomination, self-determination, subordination, termination, transillumination, vaccination
Concatenation sounds like:
constantin, constantina, constantine, constantino