Phlegm rhymes with:
alem, blehm, clem, klem, klemm, klemme, lem, lemm, alem, behm, bem, blehm, brehm, brem, cardizem, chem, clem, condemn, dehm, demme, em, emme, femme, fm, gehm, gem, gemme, hem, hemm, hemme, imm, jem, kehm, kem, khem, klem, klemm, klemme, lem, lemm, m, m., mgm, p.m., pgm, pm, ppm, prem, rehm, rem, remme, rhem, rpm, schemm, schwemm, stem, stemm, swem, temme, them
Phlegm sounds like:
palazina, paleocene, paulsen, paulson, pelagian, pelekunu, pelican, pelikan, pellicane, pellicano, peloquin, philson, phylogeny, pilson, plasma, pliocene, polcyn, policeman, policemen, policewoman, policewomen, poliquin, polskin, polson, polygamy, polygon, polygyny, polzin, populism, poulsen, poulson, powelson, pulcini