2 syllables:
brussel, brustle, bussell, bustle, casul, decyl, esile, fussell, gusle, hussle, hustle, justle, missle, mousle, muscle, mussel, mussell, nussle, nustle, rusle, russel, russell, rustle, thrustle, trussell, tussal, tussle, bisel, bissel, bissell, bristle, byssal, cissell, crissal, fissel, fissell, fissile, fissle, gisle, gissel, glycel, glycyl, grisel, gristle, hisel, istle, kisel, kissel, kissell, krystle, missal, missel, missil, missile, mistle, nissl, schissel, scissel, scissil, scissile, shtisel, sisel, sissel, thistle, this hill, this ill, tricil, visile, whistle, wissel

3 syllables:
arbuscle, cheek muscle, crepuscle, earl russell, eye muscle, gail russell, heart muscle, mofussil, outmuscle, pertussal, smooth muscle, ulcuscle, abyssal, barbicel, birtwhistle, birtwistle, blessed thistle, blue thistle, boar thistle, boat whistle, brook thistle, bull thistle, dickcissel, dificil, dismissal, entwistle, epistle, field thistle, globe thistle, haltwhistle, horse thistle, inisle, milk thistle, musk thistle, nonfissile, plume thistle, premysl, scotch thistle, sow-thistle, sow thistle, spear thistle, star-thistle, steam whistle, tin whistle, white thistle, wolf-whistle

4 syllables:
bertrand russell, facial muscle, klangkarussell, leon russell, marine mussel, taylor russell, wyatt russell, zebra mussel, ansegisel, antimissile, appendiceal, cacomistle, circumscissile, cotton thistle, creeping thistle, euromissile, golden thistle, guided missile, holy thistle, hypabyssal, john entwistle, lady's thistle, naval missile, nodding thistle, pennywhistle, russian thistle, woolly thistle

5 syllables:
abductor muscle, addison russell, cardiac muscle, david o. russell, edible mussel, freshwater mussel, pectoral muscle, skeletal muscle, ballistic missile, barnaby's thistle, canada thistle, factory whistle

6 syllables:
american hustle, sartorius muscle, voluntary muscle, judgement of dismissal, judgment of dismissal, melancholy thistle

7 syllables:
antagonistic muscle, greater pectoral muscle, involuntary muscle, smaller pectoral muscle, antiballistic missile, our lady's mild thistle

8 syllables:
bertrand arthur william russell, european woolly thistle

11 syllables:
intercontinental ballistic missile

1 syllable:
snivel

2 syllables:
sizzle, piffle, civil, drizzle, skiffle, mizzle, sniffle, fizzle, riffle, swivel, grizzle, chisel, drivel, frizzle, shrivel, frivol, swizzle, sisal, wiffle

3 syllables:
despisal, cold chisel, altricial, initial, devisal, revisal, judicial, official, uncivil, drove chisel, set chisel, wood chisel

4 syllables:
artificial, firmer chisel, beneficial, prejudicial, unofficial, superficial, ripping chisel

5 syllables:
hypophysial, football official

6 syllables:
elected official, federal official

8 syllables:
administrative official, mutually beneficial