2 syllables:
creason, cuisson, diesen, dreessen, driessen, feesten, friesen, giesen, gleason, greason, greece in, greeson, je hsin, lease in, leason, leeson, liesin, mi son, mi sun, neeson, nessen, niesen, paesan, peace in, piece in, riesen, seisan, thiesen, thiessen, wiesen

3 syllables:
adhesin, althesin, andreason, andreessen, andresen, andriessen, ceresin, cohesin, decrease in, halicin, increase in, matthiessen, police in, release in, sericin, taliesin, tunicin

4 syllables:
carubicin, navicecen, pimaricin, shin hye-sun

5 syllables:
amphotericin, daunorubicin, doxorubicin, epirubicin, idarubicin, oleoresin, tiffani thiessen

2 syllables:
frisian, fission, lycian, titian, stiffen, griffon, vision, driven, risen, mizzen, whitsun, prison, tisane, mission, writhen, sivan, given, gryphon, breathe in, even

3 syllables:
prevision, position, admission, tahitian, vendition, tradition, ignition, collision, sedition, decision, perdition, monition, excision, rescission, magician, fruition, ambition, forgiven, emission, tuition, technician, precision, contrition, condition, arisen, transition, addition, envision, mortician, edition, optician, rendition, incision, remission, volition, clinician, audition, transmission, patrician, cognition, submission, physician, provision, revision, elysian, derision, sortition, logician, petition, abscission, partition, omission, division, elision, commission, attrition, musician, nutrition, munition, night vision, suspicion, galician, parisian, imprison, detrition, tactician, permission, believe in, break even, get even

4 syllables:
saurischian, deglutition, in condition, dietitian, inhibition, apposition, ammunition, imposition, ornithischian, composition, malnutrition, cell division, imbibition, coalition, field emission, phase transition, exhibition, premonition, intromission, long division, parturition, intermission, esthetician, repetition, micturition, acquisition, house physician, erudition, cosmetician, postposition, ordovician, prohibition, trade edition, imprecision, politician, brussels griffon, demolition, indecision, definition, supervision, obstetrician, short division, rhetorician, dietician, competition, preterition, readmission, reposition, manumission, admonition, extradition, preposition, superstition, inanition, inquisition, recondition, electrician, aesthetician, requisition, expedition, disquisition, deposition, proposition, circumcision, transposition, recognition, precondition, apparition, supposition, statistician, precognition, malposition, split decision, phonetician, abolition, exposition, opposition, disposition, intuition, getting even

5 syllables:
juxtaposition, mathematician, dialectician, photoemission, lotus position, geriatrician, decomposition, predisposition, indisposition, dental technician, academician, presupposition, pediatrician, semiotician, paediatrician, geometrician, redefinition, interposition, theoretician, arithmetician, nuclear fission

6 syllables:
boundary condition, econometrician, limited edition, reduction division, resident physician, writ of prohibition

7 syllables:
double decomposition, automatic transmission, missionary position, electrodeposition, secondary emission

8 syllables:
reciprocal inhibition

9 syllables:
atomic energy commission