Undertook rhymes with:
overtook, mistook, overtook, retook, took, tooke, book, brook, brooke, chinook, chook, cook, cooke, create-a-book, crook, crooke, decook, flook, forsook, gobbledygook, gook, hook, hooke, kirkuk, look, mccook, mistook, mook, nook, overcook, overtook, precook, rebook, retook, rook, rooke, schnook, schook, shook, snook, stroock, took, tooke, unbook, undercook, unhook, vanhook, zook
Undertook sounds like:
underdog, underdogs, undertake, undertakes, undertows, underwoods, underwrites, unitrode's, untruths