3 Syllablesbonneted, closeted, cognitive, cometoid, coppicing, cosseted, cosseting, cottaging, crocketed, crocketing, docketed, fossicking, gobleted, homaging, knowledging, objected, objecthod, objecting, pocketed, pocketing, politic, politicks, politics, posited, positing, positive, profited, profiting, profitted, profitting, promising, prophethod, prosthesis, rocheted, rocketed, rocketing, rollicking, rosining, solacing, sonneting, vomited, vomiting
Now you can make multisyllabic rhymes in the new rhymit app :)
4 Syllablesabolishing, acknowledging, astonishing, biolysis, compositing, compositive, demolishing, deposited, depositing, expositive, geopolitics, hydrolysis, hypophysis, hypothesis, impolitic, photolysis, politices, politicked, politicus, positiveid, positives, postpositive, prepositive, promisingnes, thermolysis, unpromising
5 Syllablesastonishingnes, electrolysis, impoliticnes, positivenes, unpromisingnes
6 Syllablesbacteriolysis, electropositive