3 syllables:
piculet, spiculate

4 syllables:
aciculate, apiculate, articulate, colliculate, dearticulate, forficulate, gesticulate, graticulate, lenticulate, monticulate, particulate, puncticulate, reticulate, straticulate, testiculate, turriculate, unguiculate, vehiculate, vermiculate, verriculate

5 syllables:
biarticulate, bidenticulate, canaliculate, disarticulate, diverticulate, exarticulate, inarticulate, multarticulate, nonparticulate, nonreticulate, triarticulate, unarticulate

3 syllables:
titillate, middleweight, dissipate, scintillate, indicate, innovate, stridulate, distillate, instigate, nictitate, sibilate, illustrate, insensate, stipulate, pistillate, syndicate, imprecate, bichromate, mitigate, insulate, inundate, immigrate, integrate, inculcate, immolate, trilobate, incubate, syncopate, spindle-shaped, intonate, silicate, vindicate, stimulate, bisulcate, imitate, divagate, bilobate, criminate, intimate, simulate, bivalent, difficult, diffident, dissonant, filament, hiccough nut, immanent, immigrant, imminent, implement, impotent, incident, increment, indolent, infinite, innocent, insolent, instigant, instrument, insulant, intricate, ligament, liniment, littlest, militant, ministrant, sibilant, stimulant, symbolist, timpanist, vigilant

4 syllables:
equilibrate, disintegrate, recidivate, eliminate, debilitate, assibilate, salicylate, dissimulate, participate, invigilate, incriminate, anticipate, sophisticate, manipulate, reciprocate, dissimilate, facilitate, pontificate, equivocate, assimilate, originate, discriminate, acidulate, reintegrate, acidulent, ambivalent, anticipant, be intimate, coincident, coquilla nut, debt instrument, equivalent, grandiloquent, imprisonment, legitimate, magnificent, magniloquent, medicament, munificent, omnipotent, participant, polygynist, predicament, sealed instrument, sports implement, stringed instrument, unvigilant, wind instrument

5 syllables:
recapitulate, rehabilitate, junior middleweight, abolitionist, bowed stringed instrument, cleaning implement, cutting implement, drafting instrument, false imprisonment, indiscriminate, individuate, legal instrument, milliequivalent, nonparticipant, transit instrument, unearned increment, woodwind instrument, writing implement

6 syllables:
commercial instrument, measuring instrument, medical instrument, musical instrument, optical instrument, percussion instrument, percussive instrument, sodium silicate, surgical instrument, surveying instrument

7 syllables:
common stock equivalent, derivative instrument, electronic instrument, negotiable instrument, scientific instrument, zirconium silicate

8 syllables:
navigational instrument