2 syllables:
bits in, blitzen, fits in, hitson, hits in, its in, kitson, pits in, ritson, sits in, slits in, splits in, whitson

3 syllables:
commit sin, galitsin

2 syllables:
frisian, fission, grison, lycian, frisson, listen, titian, stiffen, griffon, vision, driven, risen, mizzen, prison, christen, glisten, tisane, mission, writhen, sivan, given, gryphon, isn't, mithan, nisan, nissen, scission, sison

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, coition, fradicin, practician, recission, search mission, state prison

4 syllables:
saurischian, deglutition, in condition, dietitian, inhibition, apposition, ammunition, imposition, ornithischian, composition, malnutrition, cell division, imbibition, coalition, field emission, 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, phase transition, 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, streptolysin, abolition, exposition, opposition, disposition, intuition, bad condition, bakke decision, belgian griffon, combat mission, cross-division, eye condition, foreign mission, form division, genus sison, good condition, heart condition, in addition, in commission, in remission, jazz musician, line of vision, logistician, machine-driven, new edition, pretermission, sales division, skin condition, stage technician, syntactician, text edition, with ambition, word division

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, art exhibition, ballet position, cleanup position, colored audition, control condition, derequisition, diagnostician, face recognition, fairness commission, final decision, in opposition, newly arisen, out of commission, planning commission, price competition, price of admission, rate of attrition, redeposition, redisposition, reimposition, standard transmission, taracahitian, thermal emission, weather condition, zoning commission

6 syllables:
boundary condition, econometrician, limited edition, reduction division, resident physician, writ of prohibition, angular position, cellular division, diplomatic mission, election commission, essential condition, financial condition, hostile expedition, hunting expedition, infrared emission, judicial decision, machine politician, military mission, object recognition, phase of cell division, polar opposition, porcupine provision, radio emission, search and destroy mission, search and rescue mission, trigonometrician

7 syllables:
double decomposition, automatic transmission, missionary position, electrodeposition, secondary emission, advertising division, antiredeposition, atmospheric condition, dramatic composition, economic condition, explicit definition, favorable position, military commission, military position, musical composition, mutual opposition, population commission, sanitary condition, statistical commission, unit of ammunition, vector decomposition

8 syllables:
reciprocal inhibition, administrative division, antipodal opposition, dictionary definition, environmental condition, experimental condition, geographic expedition, literary composition, military expedition, photoelectric emission, territorial division, unfavorable position

9 syllables:
atomic energy commission, mathematical statistician, social development commission

12 syllables:
economic and social council commission