Nations' rhymes with:
assassinations, carnations, combinations, condemnations, denomination's, denominations, designations, destinations, determination's, determinations, detonations, donations, eliminations, emanations, examinations, explanations, hallucinations, imaginations, incarnations, inclinations, intonations, machinations, nation's, nations, nominations, originations, recriminations, resignations, ruminations, terminations, vaccinations
Nations' sounds like:
nading, nathan's, nation's, nations, natomas, neatness, needham's, needing, neotenic, netanyahu's, netting, newton's, newtonchik, nodding, nominating, nominations, notations, nothing, nothing's, nothings, noting, notions, nutmeg, nutting