Undertake rhymes with:
overtake, beefsteak, heartache, homestake, intake, outtake, overtake, sweepstake, uptake, backache, beefsteak, bellyache, bonebrake, cheesecake, cupcake, daybreak, earthquake, freshbake, fruitcake, handshake, headache, heartache, heartbreak, homestake, hotcake, hoylake, intake, interlake, keepsake, kittiwake, longbrake, mandrake, milkshake, muckrake, namesake, outbreak, outtake, overtake, pancake, rattlesnake, shewmake, shoemake, shortcake, shumake, silverlake, snowflake, sweepstake, testrake, timberlake, uptake, westlake
Undertake sounds like:
underdog, underdogs, undertakes, undertook, undertows, underwoods, underwrites, unitrode's, untruths