Two Syllables
dental, gentle, lentil, mental, rental, sentell, yentl, benel, dental, fehnel, fennel, fennell, gentle, grenell, haenel, henle, kennel, kennell, pennel, pennell, phenol, quennel, tennell, when'll
Four Syllables
accidental, compartmental, continental, departmental, detrimental, elemental, fundamental, governmental, incidental, incremental, instrumental, monumental, occidental, occidentale, oriental, ornamental, regimental, sentimental, supplemental, temperamental