Negotiations rhymes with:
renegotiations, association's, renegotiations, association's, depreciations, renegotiations, abbreviations, affiliations, appropriations, association's, associations, aviation's, creations, denunciations, depreciations, deviations, expropriations, humiliations, miscreations, pronunciations, radiation's, reconciliations, renegotiations, variations
Negotiations sounds like:
nastiness, nauseating, necessitating, negating, negotiating, nesting, nicotine's, nighttimes, nonacademic