3 syllables:
sweet-pea

3 syllables:
media, prinia, sepia, stevia, tenia

4 syllables:
acedia, albizia, albizzia, alpinia, amenia, anaemia, anemia, armenia, artemia, asthenia, bauhinia, blephilia, boykinia, brasenia, craspedia, dillenia, emilia, eugenia, garcinia, gleichenia, gloxinia, halenia, jacquinia, karelia, kirghizia, lasthenia, leukaemia, leukemia, lucilia, luscinia, marsilea, mass media, monilia, news media, photinia, print media, puccinia, robinia, salvinia, sapraemia, sapremia, sardinia, slovenia, swietinia, toxaemia, toxemia, uraemia, uremia, ursinia, vaccinia, xanthemia

5 syllables:
academia, acidemia, alkalemia, amphisbaenia, anoxemia, aphrodisia, apolemia, aquilegia, azotaemia, azotemia, bacteremia, bacteriemia, broadcast media, caesalpinia, caladenia, calandrinia, calystegia, catamenia, cyclopaedia, cyclopedia, cystoplegia, dipladenia, escherichia, fissipedia, genus sepia, griselinia, gymnadenia, haemophilia, hebephrenia, hemiplegia, hemophilia, hugueninia, hyperaemia, hyperemia, hypermedia, ketonemia, lacertilia, lagerstroemia, lepechinia, leucopenia, leukopenia, misopedia, multimedia, neurasthenia, neutropenia, nyctaginia, paramecia, paraphrenia, paraplegia, phoronidea, pinnipedia, piptadenia, pterocnemia, quadriplegia, remilegia, rhodymenia, rosellinia, schizophrenia, sclerotinia, septicaemia, septicemia, thalassaemia, thalassemia, thrombasthenia, thrombopenia, tularaemia, tularemia, via media

6 syllables:
acetonemia, acute leukemia, anaphrodisia, argyrotaenia, aristotelia, bacteriaemia, carotenemia, chronic leukemia, cooley's anemia, encyclopaedia, encyclopedia, genus anemia, genus emilia, genus eugenia, genus robinia, genus sardinia, hyperglycemia, hyperlipaemia, hyperlipemia, hypoglycemia, hypovolemia, misocainea, pancytopenia, pars intermedia, polycythemia, sideropenia

7 syllables:
analbuminemia, enterotoxemia, hyperlipidaemia, hyperlipidemia, latent schizophrenia, malignant anemia, pernicious anemia, thrombocytopenia

8 syllables:
afibrinogenemia, angiohemophilia, borderline schizophrenia, capital of armenia, granulocytopenia, hemolytic anemia, paranoid schizophrenia, reactive schizophrenia, refractory anemia, vascular hemophilia

9 syllables:
agammaglobulinemia, catatonic schizophrenia, disorganized schizophrenia, hyperbilirubinemia, interactive multimedia

10 syllables:
abetalipoproteinemia, catatonic type schizophrenia, disorganized type schizophrenia, hypogammaglobulinemia, iron deficiency anemia, mediterranean anemia

11 syllables:
hypobetalipoproteinemia