Words That Rhyme With "Phthalein" :
2 syllables:
alan, alkene, Allan, allen, allene, Allyn, ballon, balun, callen, chalone, choline, dalen, fallin, fallon, gallon, hallan, Hellene, Ilene, isleen, Malin, Mallon, Nalline, palen, Palin, praline, proline, ralline, squalene, talon, valine, xylene
3 syllables:
analcime, philhellene, vandalen
4 syllables:
digitalin, isohaline, isohalsine, theophylline