2 syllables:
biven, bliven, diven, dive in, drive in, five in, ivan, iven, jivin, liven, live in, niven, sliven, thrive in

3 syllables:
aek-971, alive in, arrive in, diprivan, enliven, febiven, maldivan, survive in, thalaivan

5 syllables:
sangathalaivan

12 syllables:
indo-pakistani war of 1971

2 syllables:
frisian, fission, grison, lycian, frisson, listen, titian, stiffen, griffon, vision, risen, mizzen, whitsun, prison, christen, glisten, tisane, mission, writhen, gryphon, bison, dizen, glycine, greisen, hyphen, mizen, siphon, syphon, typhon, tyson, wizen

3 syllables:
prevision, position, admission, tahitian, vendition, tradition, ignition, collision, sedition, decision, perdition, monition, excision, rescission, magician, fruition, ambition, 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, b-horizon, horizon

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, a-horizon, a horizon, bison bison, b horizon, c-horizon, c horizon, genus bison, petromyzon, soil horizon

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, gyro horizon

6 syllables:
boundary condition, econometrician, limited edition, reduction division, resident physician, writ of prohibition, american bison, apparent horizon, celestial horizon, sensible horizon, visible horizon

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

8 syllables:
reciprocal inhibition, geological horizon

9 syllables:
atomic energy commission