Waltham rhymes with:
alsthom, anthem, botham, cheetham, cotham, gotham, grantham, greetham, higgenbotham, higginbotham, higinbotham, latham, leatham, northam, southam, statham, stethem, tatham, trantham, trentham, whitham, witham, wortham
Waltham sounds like:
walden, waldheim, waldman, waldmann, waldon, waltman, walton, welden, weldin, weldon, weltman, welton, wheeldon, whelton, whilden, wildeman, wilden, wildman, wildmon, wildon, willden, wilton, wolden, woltman