Pliocene rhymes with:
biocine, miocene, adenosine, biocine, eocene, internecine, isoprinosine, kerosene, miocene, paleocene, pleistocene
Pliocene sounds like:
palazina, paleocene, paulsen, paulson, pelagian, pelekunu, pelican, pelikan, pellicane, pellicano, peloquin, philson, phlegm, phylogeny, pilson, plasma, polcyn, policeman, policemen, policewoman, policewomen, poliquin, polskin, polson, polygamy, polygon, polygyny, polzin, populism, poulsen, poulson, powelson, pulcini