Stagnation rhymes with:
designation, impregnation, indignation, resignation, abomination, alienation, antidiscrimination, assassination, carnation, combination, concatenation, condemnation, consternation, contamination, coordination, coronation, culmination, damnation, decaffeination, decontamination, denomination, desalination, designation, destination, determination, detonation, discrimination, disinclination, dissemination, divination, domination, donation, elimination, emanation, examination, explanation, extermination, fascination, germination, hallucination, hibernation, hydrogenation, hyphenation, illumination, imagination, impersonation, impregnation, incarnation, inclination, incoordination, incrimination, indignation, indoctrination, insemination, insubordination, intonation, machination, nation, nomination, nondiscrimination, ordination, origination, pagination, pollination, predestination, procrastination, profanation, recrimination, reexamination, reincarnation, rejuvenation, renomination, resignation, rumination, self-determination, subordination, termination, transillumination, vaccination