5 syllables:
antioquia

3 syllables:
cobia, hovea, kochia, koellia, kogia, nomia, phobia, protea, scopolia, sloanea, sophia, stokesia, todea

4 syllables:
abronia, acholia, achromia, agnosia, alstonia, amsonia, aphonia, atonia, bartonia, bignonia, bocconia, boltonia, cambodia, cecropia, celosia, cetonia, chaeronea, chelonia, ciconia, cladonia, claytonia, cliftonia, clintonia, comptonia, cyclopia, cydonia, dicksonia, dystopia, elodea, erolia, esthonia, estonia, glossodia, hottonia, ionia, jacksonia, jamesonia, kniphofia, laconia, mahonia, miltonia, mongolia, monrovia, myopia, nesokia, ormosia, pavonia, pisonia, pyrrosia, rauvolfia, school phobia, subtopia, synovia, tephrosia, tithonia, utopia, vernonia, zirconia, zoophobia

5 syllables:
acrophobia, adansonia, agrimonia, algophobia, allionia, amblyopia, ametropia, anatolia, androphobia, anglophobia, anhedonia, anorthopia, antigonia, aquaphobia, astraphobia, babylonia, catatonia, ceratonia, claustrophobia, collinsonia, cornucopia, cryophobia, cynophobia, darlingtonia, daubentonia, denisonia, dermatobia, dipteronia, edmontonia, embiodea, ethiopia, gynophobia, haematobia, homophobia, hydrophobia, hyperopia, hypnophobia, macedonia, musophobia, myotonia, mysophobia, nyctalopia, nyctophobia, patagonia, peperomia, phobophobia, polygonia, presbyopia, pyrophobia, saxegothea, simple phobia, social phobia, taphephobia, templetonia, tetragonia, topognosia, ulatrophia, xenophobia

6 syllables:
acarophobia, agoraphobia, ailurophobia, amyotonia, amyotrophia, aniseikonia, aristolochia, atopognosia, entomophobia, genus celosia, genus cydonia, genus vernonia, hemeralopia, hypermetropia, isometropia, lepidophobia, new caledonia, outer mongolia, satanophobia, soleirolia, thanatophobia, traumatophobia

7 syllables:
acromyotonia, anisometropia, new latin utopia, triskaidekaphobia

8 syllables:
capital of estonia, capital of mongolia

9 syllables:
capital of ethiopia