2 Syllablesfettles, kettle's, kettleers, kettles, metal's, metals, mettles, nettlers, nettles, petal's, petals, settles
Now you can make multisyllabic rhymes in the new rhymit app :)
3 Syllablesmetalics, metallus, nettlemas, petalas, petales, petalos, petalous